Use this thread to announce any publications which used the Elk Code.
Include the list of authors, journal reference, year and (optionally) abstract. You can also report any issues you had with the code as well as improvements you think could be made.
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Pressure-induced transitions from ordered intermetallic phases to substitutional alloys to semi-ordered phases were studied in a series of bismuth tellurides. By using angle-dispersive x-ray diffraction, the compounds Bi4Te5, BiTe, and Bi2Te were observed to form alloys with the disordered body-centered cubic (bcc) crystal structure upon compression to above 14–19 GPa at room temperature. The BiTe and Bi2Te alloys and the previously discovered high-pressure alloys of Bi2Te3 and Bi4Te3 were all found to show atomic ordering after gentle annealing at very moderate temperatures of ∼100°C. Upon annealing, BiTe transforms from bcc to the B2 (CsCl) crystal-structure type, and the other phases adopt semi-disordered variants thereof, featuring substitutional disorder on one of the two crystallographic sites. The transition pressures and atomic volumes of the alloy phases show systematic variations across the BimTen series including the end members Bi and Te. First-principles calculations were performed to characterize the electronic structure and chemical bonding properties of B2-type BiTe and to identify the driving forces of the ordering transition. The calculated Fermi surface of B2-type BiTe has an intricate structure and is predicted to undergo three topological changes between 20 and 60 GPa.
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Exchange interactions and Curie temperatures of Mn2CoZ compounds
M. Meinert, J.-M. Schmalhorst, and G. Reiss, J. Phys. Condens. Matter 23, 116005 (2011) 10.1088/0953-8984/23/11/116005
Itinerant and localized magnetic moments in ferrimagnetic Mn2CoGa thin films probed by x-ray magnetic linear dichroism: Experiment and ab initio theory
M. Meinert, J.-M. Schmalhorst, C. Klewe, G. Reiss, E. Arenholz, T. Böhnert, and K. Nielsch, Phys. Rev. B 84, 132405 (2011) 10.1103/PhysRevB.84.132405
Ab initio prediction of ferrimagnetism, exchange interactions and Curie temperatures in Mn2TiZ Heusler compounds
M. Meinert, J.-M. Schmalhorst, and G. Reiss, J. Phys. Condens. Matter 23, 036001 (2011) 10.1088/0953-8984/23/3/036001
Insights into the electronic structure of Co2FeSi from x-ray magnetic linear dichroism
M. Meinert, J.-M. Schmalhorst, M. Glas, G. Reiss, E. Arenholz, T. Böhnert, and K. Nielsch, Phys. Rev. B 86, 054420 (2012) 10.1103/PhysRevB.86.054420
Phase separation in Fe2CrSi thin films
M. Meinert, T. Hübner, J. Schmalhorst, G. Reiss, and E. Arenholz, J. Appl. Phys. 114, 113908 (2013) 10.1063/1.4821972
Phase stability of chromium based compensated ferrimagnets with inverse Heusler structure
M. Meinert and M. P. Geisler, J. Magn. Magn. Mater. 341, 72 (2013) 10.1016/j.jmmm.2013.04.025
Modified Becke-Johnson potential investigation of half-metallic Heusler compounds
M. Meinert, Phys. Rev. B 87, 045103 (2013) 10.1103/PhysRevB.87.045103
Electronic structure and optical band gap determination of NiFe2O4
M. Meinert and G. Reiss, J. Phys. Condens. Matter 26, 115503 (2014) 10.1088/0953-8984/26/11/115503
Experimental realization of a semiconducting full-Heusler compound: Fe2TiSi
M. Meinert, M. P. Geisler, J. Schmalhorst, U. Heinzmann, E. Arenholz, W. Hetaba, M. Stöger-Pollach, A. Hütten, and G. Reiss, Phys. Rev. B 90, 085127 (2014) 10.1103/PhysRevB.90.085127
Multiple phases in sputtered Cr2CoGa films
M. P. Geisler, M. Meinert, J. Schmalhorst, G. Reiss, and E. Arenholz, J. Alloys Compd. 598, 213 (2014) 10.1016/j.jallcom.2014.02.035
Unconventional Superconductivity in YPtBi and Related Topological Semimetals
M. Meinert, Phys. Rev. Lett. 116, 137001 (2016) 10.1103/PhysRevLett.116.137001
Exchange interactions and Curie temperatures of the tetrametal nitrides Cr4N, Mn4N, Fe4N, Co4N, and Ni4N
M. Meinert, J. Phys. Condens. Matter 28, 056006 (2016) 10.1088/0953-8984/28/5/056006
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Kurt Lejaeghere et al.
Reproducibility in density functional theory calculations of solids.
Science 351, 6280 (2016)
P Elliott, K Krieger, J K Dewhurst, S Sharma and E K U Gross
Optimal control of laser-induced spin-orbit mediated ultrafast demagnetization.
New J. Phys. 18, 013014 (2016)
-K. Krieger, J. K. Dewhurt, P. Elliott, S. Sharma and E. K. U. Gross
Laser-Induced Demagnetization at Ultrashort Time Scales: Predictions of TDDFT.
J. Chem. Theory Comput. 11, 4870 (2015)
-Y. Shinohara, S. Sharma, J. K. Dewhurst, S. Shallcross, N. N. Lathiotakis and E K U Gross
Doping induced metal-insulator phase transition in NiO: a reduced density matrix functional theory perspective.
N. J. Phys. 17, 093038 (2015)
-S. Sharma, J. K. Dewhurst, S. Shallcross, G. K. Madjarova, and E. K. U. Gross
Excitons in Organics Using Time-Dependent Density Functional Theory: PPV, Pentacene, and Picene.
J. Chem. Theory Comput. 11, 1710 (2015)
S. Sharma, J. K. Dewhurst and E. K. U. Gross
Optical response of extended systems using time-dependent density functional theory.
"First Principles Approaches to Spectroscopic Properties of Complex Materials", Eds. C. Di Valentin, S. Botti and M. Cococcioni, Topics in Current Chemistry Vol. 347, pp 235-257 (2014)
S. Sharma, J. K. Dewhurst, S. Shallcross and E. K. U. Gross
Spectral Density and Metal-Insulator Phase Transition in Mott Insulators within Reduced Density Matrix Functional Theory.
Phys. Rev. Lett. 110, 116403 (2013)
S. Sharma, J. K. Dewhurst, A. Sanna, A. Rubio and E. K. U. Gross
Enhanced excitonic effects in the energy loss spectra of LiF and Ar at large momentum transfer.
New J. Phys. 14, 053052 (2012)
A. Sanna, S. Pittalis, J. K. Dewhurst, M. Monni, S. Sharma, G. Ummarino, S. Massidda, and E. K. U. Gross
Phononic self-energy effects and superconductivity in CaC6.
Phys. Rev. B 85, 184514 (2012)
S. Sharma, J. K. Dewhurst, A. Sanna and E. K. U. Gross
Bootstrap approximation for the exchange-correlation kernel of time-dependent density functional theory.
Phys. Rev. Lett. 107, 186401 (2011)
F. Essenberger, S. Sharma, J. K. Dewhurst, C. Bersier, F. Cricchio, L. Nordstroem and E. K. U. Gross
Magnon spectrum of transition-metal oxides: Calculations including long-range magnetic interactions using the LSDA+U method.
Phys. Rev. B 84, 174425 (2011)
S.-W. Yu, J. G. Tobin, J. C. Crowhurst, S. Sharma, J. K. Dewhurst, P. Olalde-Velasco, W. L. Yang and W. J. Siekhaus
f-f origin of the insulating state in uranium dioxide: X-ray absorption experiments and first-principles calculations.
Phys. Rev. B 83, 165102 (2011)
-N. N. Lathiotakis, S. Sharma, N. Helbig, J. K. Dewhurst, M. A. L. Marques, F. Eich, T. Baldsiefen, A. Zacarias, and E. K. U. Gross
Discontinuities of the Chemical Potential in Reduced Density Matrix Functional Theory.
Z. Phys. Chem. 224, 467 (2010)
S. Sharma, S. Shallcross, J. K. Dewhurst, A. Sanna, C. Bersier, S. Massidda and E. K. U. Gross
Magnetism in CeFeAsO(1-x)F(x) and LaFeAsO(1-x)F(x) from first principles.
Phys. Rev. B 80, 184502 (2009)
S. Sharma, J. K. Dewhurst, N. N. Lathiotakis and E. K. U. Gross
Reduced Density Matrix Functional for Many-Electron Systems.
Phys. Rev. B 78, 201103 Rapid Comm. (2008)
S. Shallcross, S. Sharma, and O.A. Pankratov
Quantum interference at the twist boundary in graphene.
Phys. Rev. Lett. 101, 056803 (2008)
Last edit: Sangeeta Sharma 2016-08-03
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Temperature dependence of thermoelectric power and thermal conductivity in ferromagnetic shape memory alloy Ni50Mn34In16 in magnetic fields
L. S. Sharath Chandra, M. K. Chattopadhyay, V. K. Sharma, S. B. Roy, and Sudhir K. Pandey
Phys. Rev. B 81, 195105 (2010) http://link.aps.org/doi/10.1103/PhysRevB.81.195105
Effect of non-magnetic impurities on the magnetic states of anatase TiO2
Sudhir K. Pandey and R. J. Choudhary
J. Phys.: Condens. Matter 23, 276005 (2011)
doi:http://dx.doi.org/10.1088/0953-8984/23/27/276005
Orbital ordering in the geometrically frustrated MgV2O4 : Ab initio electronic structure calculations
Sudhir K. Pandey
Phys. Rev. B 84, 094407 (2011) http://link.aps.org/doi/10.1103/PhysRevB.84.094407
Effect of pressure on the electronic and magnetic properties of CdV2O4: Density functional theory studies
Sudhir K. Pandey
Phys. Rev. B 86, 085103 (2012) http://link.aps.org/doi/10.1103/PhysRevB.86.085103
Nitrogen and fluorine doped ZrO2: a promising p-n junction for an ultraviolet light-emitting diode
Sudhir K. Pandey
J. Phys.: Condens. Matter 24, 335801 (2012)
doi:10.1088/0953-8984/24/33/335801
A first principle study of electronic band structures and effective mass tensors of thermoelectric materials: PbTe, Mg2Si, FeGa3 and CoSb3
Sonu Sharma and Sudhir K. Pandey
Comput. Mater. Sci. 85, 340 (2014) http://dx.doi.org/10.1016/j.commatsci.2014.01.011
Pressure induced spin state transition in BiFeO3: an ab inito electronic structure calculations
Satyanarayan Patel and Sudhir K. Pandey
Eur. Phys. J. Appl. Phys. 67, 20602 (2014) http://dx.doi.org/10.1051/epjap/2014130574
Density matrix approach to the orbital ordering in the spinel vanadates: A case study
Sohan Lal and Sudhir K. Pandey
Eur. Phys. J. B 87, 197 (2014) http://dx.doi.org/10.1140/epjb/e2014-50365-0
Limitations of unconstrained LSDA+U calculations in predicting the electronic and magnetic ground state of a geometrically frustrated ZnV2O4 compound
Sohan Lal and Sudhir K. Pandey
J. Magn. Magn. Mater. 412, 23 (2016)
doi:10.1016/j.jmmm.2016.03.075
Thermal properties and electronic structure of superconducting germanide skutterudites LaPt4Ge12 and PrPt4Ge12: A multi-band perspective
L. S. Sharath Chandra, M. K. Chattopadhyay, S. B. Roy, and Sudhir K. Pandey
Philos.Mag. 96, 2161 (2016) http://dx.doi.org/10.1080/14786435.2016.1192722
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Non-Collinearity in Small Magnetic Cobalt-Benzene Molecules J. W. González, T. Alonso-Lanza, F. Delgado, F. Aguilera-Granja, A. Ayuela
https://arxiv.org/abs/1611.07846
Cobalt clusters covered with benzene in the form of rice-ball structures have recently been synthesized using laser ablation. Here, we investigate the types of magnetic order such clusters have, and whether they retain any magnetic order at all. We use different density functional theory (DFT) methods to study the experimentally relevant three cobalt atoms surrounded by benzene rings. We found that the benzene rings induce a ground state with non-collinear magnetization, with the magnetic moments localized on the cobalt centers and lying on the plane formed by the three cobalt atoms. This is surprising because nanostructures and small clusters based on pure cobalt typically have a predominantly ferromagnetic order, and additional organic ligands such as benzene tend to remove the magnetization. We analyze the magnetism of such a cluster using an anisotropic Heisenberg model where the involved parameters are obtained by a comparison with the DFT results. Moreover, we propose electron paramagnetic resonance as an experimental tool to study the anisotropic response.
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Quasi-static magnetoelectric quadrupoles as the order parameter for the pseudo-gap phase in cuprate superconductors
M. Fechner, M. J. A. Fierz,F. Thöle, U. Staub, and N. A. Spaldin
We introduce a mechanism in which coupling between fluctuating spin magnetic dipole moments and polar optical phonons leads to a nonzero ferroic ordering of quasistatic magnetoelectric multipoles. Using first- principles calculations within the LSDA + U method of density functional theory, we calculate the magnitude of the effect for the prototypical cuprate superconductor HgBa2CuO4. We show that our proposed mechanism is consistent, to our knowledge, with all experimental data for the onset of the pseudogap phase and therefore propose the quasistatic magnetoelectric multipole as a possible pseudogap order parameter. Finally, we show that our mechanism embraces some key aspects of previous theoretical models, in particular the description of the pseudogap phase in terms of orbital currents.
Mössbauer parameters of Fe-related defects in group-IV semiconductors: First principles calculations E. Wright, J. Coutinho, S. Öberg, and V. J. B. Torres
Journal of Applied Physics 119 (18), 181509 (2016)
We employ a combination of pseudopotential and all-electron density functional calculations, to relate the structure of defects in supercells to the isomer shifts and quadrupole splittings observed in Möossbauer spectroscopy experiments. The methodology is comprehensively reviewed and applied to the technologically relevant case of iron-related defects in silicon, and to other group-IV hosts to a lesser degree. Investigated defects include interstitial and substitutional iron, iron-boron pairs, iron-vacancy, and iron-divacancy. We find that, in general, agreement between the calculations and Möossbauer data is within a 10% error bar. Nonetheless, we show that the methodology can be used to make accurate assignments, including to separate peaks of similar defects in slightly different environments.
doi:10.1063/1.494824310.1063/1.4948243
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Optically induced lattice deformations, electronic structure changes, and enhanced superconductivity in YBa2Cu3O6.48
R. Mankowsky, M. Fechner, M. Först, A. von Hoegen, J. Porras, T. Loew, G.L. Dakovski, M. Seaberg, S. Möller, G. Coslovich, B. Keimer, S.S. Dhesi, A. Cavalleri
Resonant optical excitation of apical oxygen vibrational modes in the normal state of underdoped YBa2Cu3O6+x induces a transient state with optical properties similar to those of the equilibrium superconducting state. Amongst these, a divergent imaginary conductivity and a plasma edge are transiently observed in the photo-stimulated state. Femtosecond hard x-ray diffraction experiments have been used in the past to identify the transient crystal structure in this non-equilibrium state. Here, we start from these crystallographic features and theoretically predict the corresponding electronic rearrangements that accompany these structural deformations. Using density functional theory, we predict enhanced hole-doping of the CuO2 planes. The empty chain Cu dy2-z2 orbital is calculated to strongly reduce in energy, which would increase c-axis transport and potentially enhance the interlayer Josephson coupling as observed in the THz-frequency response. From these calculations, we predict changes in the soft x-ray absorption spectra at the Cu L-edge. Femtosecond x-ray pulses from a free electron laser are used to probe these changes in absorption at two photon energies along this spectrum, and provide data consistent with these predictions.
Comment on “Electron-phonon coupling in two-dimensional silicene and germanene”.
M.E. Cifuentes-Quintal, O. de la Peña-Seaman, and R. de Coss.
Physical Review B 96, 047401 (2017).
Density functional investigations on electronic structures, magnetic ordering and ferroelectric phase transition in multiferroic Bi2NiMnO6
HJ Zhao, XQ Liu, XM Chen
AIP Advances 2 (2), 022115
First-principles study on the differences of possible ferroelectric behavior and magnetic exchange interaction between Bi2NiMnO6 and La2NiMnO6
HJ Zhao, XM Chen
AIP Advances 2 (4), 042143
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Out-of-plane Enhanced Magnetic Anisotropy Energy in Nickel-Benzene Complexes
Tomás Alonso-Lanza, Jhon W. González, Faustino Aguilera-Granja, Andrés Ayuela
https://arxiv.org/abs/1710.07519
We herein investigate made of nickel atoms surrounded by benzene molecules and focus specifically on magnetic Ni3Bz3 molecule. By means of calculations including relativistic spin-orbit terms, we show that this molecule reveals a large magnetic anisotropy energy of approximately 8 meV, found with the easy axis out-of-plane to the metal atoms. Note that the matching bare Ni3 cluster have a large magnetic anisotropy and the easy axis is in-plane. Benzene molecules are thus switching the easy axis from in-plane for Ni3 to out-of-plane for Ni3Bz3.
Last edit: JW 2018-06-05
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You-Zhao Lan*
First-principles studies of effects of layer stacking, opposite atoms, and stacking order on two-photon absorption of two-dimensional layered silicon carbide
Computational Materials Science, 151 (2018) 231
You-Zhao Lan*
Excitonic effects on the optical response of monolayer and bilayer graphene-like silicon carbide
Computational Materials Science, 138 (2017) 213–218
You-Zhao Lan
New understandings of third harmonic generation coefficient of bulksilicon: Implementation and application of the full ab initio bandstructure sum-over-states method
Computational Condensed Matter, 8(2016)22
Last edit: Youzhao Lan 2018-07-14
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Ultrafast Relaxation Dynamics of the Antiferrodistortive Phase in Ca Doped SrTiO3
M. Porer, M. Fechner, E. M. Bothschafter, L. Rettig, M. Savoini, V. Esposito, J. Rittmann, M. Kubli, M. J. Neugebauer, E. Abreu, T. Kubacka, T. Huber, G. Lantz, S. Parchenko, S. Grübel, A. Paarmann, J. Noack, P. Beaud, G. Ingold, U. Aschauer, S. L. Johnson, and U. Staub,
Role of hybridization and on-site correlations in generating plasmons in strongly correlated
La2CuO4
Muhammad Avicenna Naradipa, Paolo Emilio Trevisanutto, Teguh Citra Asmara, Muhammad Aziz Majidi, and Andrivo Rusydi
Phys. Rev. B 101, 201102(R) – Published 5 May 2020 https://doi.org/10.1103/PhysRevB.101.201102
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Unravelling Photoinduced Interlayer Spin Transfer Dynamics in Two-Dimensional Nonmagnetic-Ferromagnetic van der Waals Heterostructures
Junjie He, Shuo Li, Arkamita Bandyopadhyay, and Thomas Frauenheim
Nano Lett. 2021, 21, 3237−3244
Optically Driven Ultrafast Magnetic Order Transitions in Two-Dimensional Ferrimagnetic MXenes
Junjie He and Thomas Frauenheim
J. Phys. Chem. Lett. 2020, 11, 15, 6219–6226
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Electronic excitation spectra of cerium oxides: from ab initio dielectric response functions to Monte Carlo electron transport simulations
Andrea Pedrielli, Pablo de Vera, Paolo E. Trevisanutto, Nicola M. Pugno, Rafael Garcia-Molina, Isabel Abril, Simone Taioli, and Maurizio Dapor
Phys. Chem. Chem. Phys., 2021, 23, 19173-19187
DOI: 10.1039/D1CP01810H
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In search of the ground-state crystal structure of Ta2O5 from ab initio and Monte Carlo simulations
Andrea Pedrielli, Nicola M. Pugno, Maurizio Dapor, and Simone Taioli
Computational Materials Science, Volume 216, 2023, 111828 https://doi.org/10.1016/j.commatsci.2022.11182
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Use this thread to announce any publications which used the Elk Code.
Include the list of authors, journal reference, year and (optionally) abstract. You can also report any issues you had with the code as well as improvements you think could be made.
Atomic Ordering in Cubic Bismuth Telluride Alloy Phases at High Pressure
I. Loa, J.-W. G. Bos, R. A. Downie, K. Syassen
Phys. Rev. B 93, 224109 (2016)
http://arxiv.org/abs/1606.02495
Pressure-induced transitions from ordered intermetallic phases to substitutional alloys to semi-ordered phases were studied in a series of bismuth tellurides. By using angle-dispersive x-ray diffraction, the compounds Bi4Te5, BiTe, and Bi2Te were observed to form alloys with the disordered body-centered cubic (bcc) crystal structure upon compression to above 14–19 GPa at room temperature. The BiTe and Bi2Te alloys and the previously discovered high-pressure alloys of Bi2Te3 and Bi4Te3 were all found to show atomic ordering after gentle annealing at very moderate temperatures of ∼100°C. Upon annealing, BiTe transforms from bcc to the B2 (CsCl) crystal-structure type, and the other phases adopt semi-disordered variants thereof, featuring substitutional disorder on one of the two crystallographic sites. The transition pressures and atomic volumes of the alloy phases show systematic variations across the BimTen series including the end members Bi and Te. First-principles calculations were performed to characterize the electronic structure and chemical bonding properties of B2-type BiTe and to identify the driving forces of the ordering transition. The calculated Fermi surface of B2-type BiTe has an intricate structure and is predicted to undergo three topological changes between 20 and 60 GPa.
Exchange interactions and Curie temperatures of Mn2CoZ compounds
M. Meinert, J.-M. Schmalhorst, and G. Reiss, J. Phys. Condens. Matter 23, 116005 (2011)
10.1088/0953-8984/23/11/116005
Itinerant and localized magnetic moments in ferrimagnetic Mn2CoGa thin films probed by x-ray magnetic linear dichroism: Experiment and ab initio theory
M. Meinert, J.-M. Schmalhorst, C. Klewe, G. Reiss, E. Arenholz, T. Böhnert, and K. Nielsch, Phys. Rev. B 84, 132405 (2011)
10.1103/PhysRevB.84.132405
Ab initio prediction of ferrimagnetism, exchange interactions and Curie temperatures in Mn2TiZ Heusler compounds
M. Meinert, J.-M. Schmalhorst, and G. Reiss, J. Phys. Condens. Matter 23, 036001 (2011)
10.1088/0953-8984/23/3/036001
Insights into the electronic structure of Co2FeSi from x-ray magnetic linear dichroism
M. Meinert, J.-M. Schmalhorst, M. Glas, G. Reiss, E. Arenholz, T. Böhnert, and K. Nielsch, Phys. Rev. B 86, 054420 (2012)
10.1103/PhysRevB.86.054420
Phase separation in Fe2CrSi thin films
M. Meinert, T. Hübner, J. Schmalhorst, G. Reiss, and E. Arenholz, J. Appl. Phys. 114, 113908 (2013)
10.1063/1.4821972
Phase stability of chromium based compensated ferrimagnets with inverse Heusler structure
M. Meinert and M. P. Geisler, J. Magn. Magn. Mater. 341, 72 (2013)
10.1016/j.jmmm.2013.04.025
Modified Becke-Johnson potential investigation of half-metallic Heusler compounds
M. Meinert, Phys. Rev. B 87, 045103 (2013)
10.1103/PhysRevB.87.045103
Electronic structure and optical band gap determination of NiFe2O4
M. Meinert and G. Reiss, J. Phys. Condens. Matter 26, 115503 (2014)
10.1088/0953-8984/26/11/115503
Experimental realization of a semiconducting full-Heusler compound: Fe2TiSi
M. Meinert, M. P. Geisler, J. Schmalhorst, U. Heinzmann, E. Arenholz, W. Hetaba, M. Stöger-Pollach, A. Hütten, and G. Reiss, Phys. Rev. B 90, 085127 (2014)
10.1103/PhysRevB.90.085127
Multiple phases in sputtered Cr2CoGa films
M. P. Geisler, M. Meinert, J. Schmalhorst, G. Reiss, and E. Arenholz, J. Alloys Compd. 598, 213 (2014)
10.1016/j.jallcom.2014.02.035
Unconventional Superconductivity in YPtBi and Related Topological Semimetals
M. Meinert, Phys. Rev. Lett. 116, 137001 (2016)
10.1103/PhysRevLett.116.137001
Exchange interactions and Curie temperatures of the tetrametal nitrides Cr4N, Mn4N, Fe4N, Co4N, and Ni4N
M. Meinert, J. Phys. Condens. Matter 28, 056006 (2016)
10.1088/0953-8984/28/5/056006
Kurt Lejaeghere et al.
Reproducibility in density functional theory calculations of solids.
Science 351, 6280 (2016)
P Elliott, K Krieger, J K Dewhurst, S Sharma and E K U Gross
Optimal control of laser-induced spin-orbit mediated ultrafast demagnetization.
New J. Phys. 18, 013014 (2016)
-K. Krieger, J. K. Dewhurt, P. Elliott, S. Sharma and E. K. U. Gross
Laser-Induced Demagnetization at Ultrashort Time Scales: Predictions of TDDFT.
J. Chem. Theory Comput. 11, 4870 (2015)
-Y. Shinohara, S. Sharma, J. K. Dewhurst, S. Shallcross, N. N. Lathiotakis and E K U Gross
Doping induced metal-insulator phase transition in NiO: a reduced density matrix functional theory perspective.
N. J. Phys. 17, 093038 (2015)
-S. Sharma, J. K. Dewhurst, S. Shallcross, G. K. Madjarova, and E. K. U. Gross
Excitons in Organics Using Time-Dependent Density Functional Theory: PPV, Pentacene, and Picene.
J. Chem. Theory Comput. 11, 1710 (2015)
S. Sharma, J. K. Dewhurst and E. K. U. Gross
Optical response of extended systems using time-dependent density functional theory.
"First Principles Approaches to Spectroscopic Properties of Complex Materials", Eds. C. Di Valentin, S. Botti and M. Cococcioni, Topics in Current Chemistry Vol. 347, pp 235-257 (2014)
S. Sharma, J. K. Dewhurst, S. Shallcross and E. K. U. Gross
Spectral Density and Metal-Insulator Phase Transition in Mott Insulators within Reduced Density Matrix Functional Theory.
Phys. Rev. Lett. 110, 116403 (2013)
S. Sharma, J. K. Dewhurst, A. Sanna, A. Rubio and E. K. U. Gross
Enhanced excitonic effects in the energy loss spectra of LiF and Ar at large momentum transfer.
New J. Phys. 14, 053052 (2012)
A. Sanna, S. Pittalis, J. K. Dewhurst, M. Monni, S. Sharma, G. Ummarino, S. Massidda, and E. K. U. Gross
Phononic self-energy effects and superconductivity in CaC6.
Phys. Rev. B 85, 184514 (2012)
S. Sharma, J. K. Dewhurst, A. Sanna and E. K. U. Gross
Bootstrap approximation for the exchange-correlation kernel of time-dependent density functional theory.
Phys. Rev. Lett. 107, 186401 (2011)
F. Essenberger, S. Sharma, J. K. Dewhurst, C. Bersier, F. Cricchio, L. Nordstroem and E. K. U. Gross
Magnon spectrum of transition-metal oxides: Calculations including long-range magnetic interactions using the LSDA+U method.
Phys. Rev. B 84, 174425 (2011)
S.-W. Yu, J. G. Tobin, J. C. Crowhurst, S. Sharma, J. K. Dewhurst, P. Olalde-Velasco, W. L. Yang and W. J. Siekhaus
f-f origin of the insulating state in uranium dioxide: X-ray absorption experiments and first-principles calculations.
Phys. Rev. B 83, 165102 (2011)
-N. N. Lathiotakis, S. Sharma, N. Helbig, J. K. Dewhurst, M. A. L. Marques, F. Eich, T. Baldsiefen, A. Zacarias, and E. K. U. Gross
Discontinuities of the Chemical Potential in Reduced Density Matrix Functional Theory.
Z. Phys. Chem. 224, 467 (2010)
S. Sharma, S. Shallcross, J. K. Dewhurst, A. Sanna, C. Bersier, S. Massidda and E. K. U. Gross
Magnetism in CeFeAsO(1-x)F(x) and LaFeAsO(1-x)F(x) from first principles.
Phys. Rev. B 80, 184502 (2009)
S. Sharma, J. K. Dewhurst, N. N. Lathiotakis and E. K. U. Gross
Reduced Density Matrix Functional for Many-Electron Systems.
Phys. Rev. B 78, 201103 Rapid Comm. (2008)
S. Shallcross, S. Sharma, and O.A. Pankratov
Quantum interference at the twist boundary in graphene.
Phys. Rev. Lett. 101, 056803 (2008)
Last edit: Sangeeta Sharma 2016-08-03
Temperature dependence of thermoelectric power and thermal conductivity in ferromagnetic shape memory alloy Ni50Mn34In16 in magnetic fields
L. S. Sharath Chandra, M. K. Chattopadhyay, V. K. Sharma, S. B. Roy, and Sudhir K. Pandey
Phys. Rev. B 81, 195105 (2010)
http://link.aps.org/doi/10.1103/PhysRevB.81.195105
Effect of non-magnetic impurities on the magnetic states of anatase TiO2
Sudhir K. Pandey and R. J. Choudhary
J. Phys.: Condens. Matter 23, 276005 (2011)
doi:http://dx.doi.org/10.1088/0953-8984/23/27/276005
Orbital ordering in the geometrically frustrated MgV2O4 : Ab initio electronic structure calculations
Sudhir K. Pandey
Phys. Rev. B 84, 094407 (2011)
http://link.aps.org/doi/10.1103/PhysRevB.84.094407
Effect of pressure on the electronic and magnetic properties of CdV2O4: Density functional theory studies
Sudhir K. Pandey
Phys. Rev. B 86, 085103 (2012)
http://link.aps.org/doi/10.1103/PhysRevB.86.085103
Nitrogen and fluorine doped ZrO2: a promising p-n junction for an ultraviolet light-emitting diode
Sudhir K. Pandey
J. Phys.: Condens. Matter 24, 335801 (2012)
doi:10.1088/0953-8984/24/33/335801
A first principle study of electronic band structures and effective mass tensors of thermoelectric materials: PbTe, Mg2Si, FeGa3 and CoSb3
Sonu Sharma and Sudhir K. Pandey
Comput. Mater. Sci. 85, 340 (2014)
http://dx.doi.org/10.1016/j.commatsci.2014.01.011
Pressure induced spin state transition in BiFeO3: an ab inito electronic structure calculations
Satyanarayan Patel and Sudhir K. Pandey
Eur. Phys. J. Appl. Phys. 67, 20602 (2014)
http://dx.doi.org/10.1051/epjap/2014130574
Density matrix approach to the orbital ordering in the spinel vanadates: A case study
Sohan Lal and Sudhir K. Pandey
Eur. Phys. J. B 87, 197 (2014)
http://dx.doi.org/10.1140/epjb/e2014-50365-0
Limitations of unconstrained LSDA+U calculations in predicting the electronic and magnetic ground state of a geometrically frustrated ZnV2O4 compound
Sohan Lal and Sudhir K. Pandey
J. Magn. Magn. Mater. 412, 23 (2016)
doi:10.1016/j.jmmm.2016.03.075
Thermal properties and electronic structure of superconducting germanide skutterudites LaPt4Ge12 and PrPt4Ge12: A multi-band perspective
L. S. Sharath Chandra, M. K. Chattopadhyay, S. B. Roy, and Sudhir K. Pandey
Philos.Mag. 96, 2161 (2016)
http://dx.doi.org/10.1080/14786435.2016.1192722
Na3Bi: A Robust Material Offering Dirac Electrons for Device Applications
Jagdish Kumar, Pooja Kapoor, P. K. Ahluwalia
Journal of Elec Materi (2015) 44: 3215
http://link.springer.com/article/10.1007/s11664-015-3802-9
Non-Collinearity in Small Magnetic Cobalt-Benzene Molecules
J. W. González, T. Alonso-Lanza, F. Delgado, F. Aguilera-Granja, A. Ayuela
https://arxiv.org/abs/1611.07846
Cobalt clusters covered with benzene in the form of rice-ball structures have recently been synthesized using laser ablation. Here, we investigate the types of magnetic order such clusters have, and whether they retain any magnetic order at all. We use different density functional theory (DFT) methods to study the experimentally relevant three cobalt atoms surrounded by benzene rings. We found that the benzene rings induce a ground state with non-collinear magnetization, with the magnetic moments localized on the cobalt centers and lying on the plane formed by the three cobalt atoms. This is surprising because nanostructures and small clusters based on pure cobalt typically have a predominantly ferromagnetic order, and additional organic ligands such as benzene tend to remove the magnetization. We analyze the magnetism of such a cluster using an anisotropic Heisenberg model where the involved parameters are obtained by a comparison with the DFT results. Moreover, we propose electron paramagnetic resonance as an experimental tool to study the anisotropic response.
Quasi-static magnetoelectric quadrupoles as the order parameter for the pseudo-gap phase in cuprate superconductors
M. Fechner, M. J. A. Fierz,F. Thöle, U. Staub, and N. A. Spaldin
We introduce a mechanism in which coupling between fluctuating spin magnetic dipole moments and polar optical phonons leads to a nonzero ferroic ordering of quasistatic magnetoelectric multipoles. Using first- principles calculations within the LSDA + U method of density functional theory, we calculate the magnitude of the effect for the prototypical cuprate superconductor HgBa2CuO4. We show that our proposed mechanism is consistent, to our knowledge, with all experimental data for the onset of the pseudogap phase and therefore propose the quasistatic magnetoelectric multipole as a possible pseudogap order parameter. Finally, we show that our mechanism embraces some key aspects of previous theoretical models, in particular the description of the pseudogap phase in terms of orbital currents.
http://journals.aps.org/prb/abstract/10.1103/PhysRevB.93.174419
Mössbauer parameters of Fe-related defects in group-IV semiconductors: First principles calculations
E. Wright, J. Coutinho, S. Öberg, and V. J. B. Torres
Journal of Applied Physics 119 (18), 181509 (2016)
We employ a combination of pseudopotential and all-electron density functional calculations, to relate the structure of defects in supercells to the isomer shifts and quadrupole splittings observed in Möossbauer spectroscopy experiments. The methodology is comprehensively reviewed and applied to the technologically relevant case of iron-related defects in silicon, and to other group-IV hosts to a lesser degree. Investigated defects include interstitial and substitutional iron, iron-boron pairs, iron-vacancy, and iron-divacancy. We find that, in general, agreement between the calculations and Möossbauer data is within a 10% error bar. Nonetheless, we show that the methodology can be used to make accurate assignments, including to separate peaks of similar defects in slightly different environments.
doi:10.1063/1.494824310.1063/1.4948243
Optically induced lattice deformations, electronic structure changes, and enhanced superconductivity in YBa2Cu3O6.48
R. Mankowsky, M. Fechner, M. Först, A. von Hoegen, J. Porras, T. Loew, G.L. Dakovski, M. Seaberg, S. Möller, G. Coslovich, B. Keimer, S.S. Dhesi, A. Cavalleri
Resonant optical excitation of apical oxygen vibrational modes in the normal state of underdoped YBa2Cu3O6+x induces a transient state with optical properties similar to those of the equilibrium superconducting state. Amongst these, a divergent imaginary conductivity and a plasma edge are transiently observed in the photo-stimulated state. Femtosecond hard x-ray diffraction experiments have been used in the past to identify the transient crystal structure in this non-equilibrium state. Here, we start from these crystallographic features and theoretically predict the corresponding electronic rearrangements that accompany these structural deformations. Using density functional theory, we predict enhanced hole-doping of the CuO2 planes. The empty chain Cu dy2-z2 orbital is calculated to strongly reduce in energy, which would increase c-axis transport and potentially enhance the interlayer Josephson coupling as observed in the THz-frequency response. From these calculations, we predict changes in the soft x-ray absorption spectra at the Cu L-edge. Femtosecond x-ray pulses from a free electron laser are used to probe these changes in absorption at two photon energies along this spectrum, and provide data consistent with these predictions.
https://arxiv.org/pdf/1701.08358
(accepted in Structural Dynamics)
Comment on “Electron-phonon coupling in two-dimensional silicene and germanene”.
M.E. Cifuentes-Quintal, O. de la Peña-Seaman, and R. de Coss.
Physical Review B 96, 047401 (2017).
DOI: https://doi.org/10.1103/PhysRevB.96.047401
arxiv: https://arxiv.org/abs/1707.03075
Last edit: Eduardo Cifuentes 2017-08-01
Density functional investigations on electronic structures, magnetic ordering and ferroelectric phase transition in multiferroic Bi2NiMnO6
HJ Zhao, XQ Liu, XM Chen
AIP Advances 2 (2), 022115
First-principles study on the differences of possible ferroelectric behavior and magnetic exchange interaction between Bi2NiMnO6 and La2NiMnO6
HJ Zhao, XM Chen
AIP Advances 2 (4), 042143
Out-of-plane Enhanced Magnetic Anisotropy Energy in Nickel-Benzene Complexes
Tomás Alonso-Lanza, Jhon W. González, Faustino Aguilera-Granja, Andrés Ayuela
https://arxiv.org/abs/1710.07519
We herein investigate made of nickel atoms surrounded by benzene molecules and focus specifically on magnetic Ni3Bz3 molecule. By means of calculations including relativistic spin-orbit terms, we show that this molecule reveals a large magnetic anisotropy energy of approximately 8 meV, found with the easy axis out-of-plane to the metal atoms. Note that the matching bare Ni3 cluster have a large magnetic anisotropy and the easy axis is in-plane. Benzene molecules are thus switching the easy axis from in-plane for Ni3 to out-of-plane for Ni3Bz3.
Last edit: JW 2018-06-05
Photoemission study of the electronic structure of the Kondo lattices Yb2Pt6X15 (X=Al, Ga)
Phys. Rev. B 96, 045117 – Published 14 July 2017
Awabaikeli Rousuli, Shogo Nakamura, Hitoshi Sato, Takuya Ueda, Yuji Matsumoto, Shigeo Ohara, Eike F. Schwier, Toshiki Nagasaki, Kojiro Mimura, Hiroaki Anzai, Katsuya Ichiki, Shigenori Ueda, Kenya Shimada, Hirofumi Namatame, and Masaki Taniguchi
Pressure-induced phase transition in LaCo5 studied by x-ray emission spectroscopy, x-ray diffraction, and density functional theory
Phys. Rev. B 94, 165156 – Published 24 October 2016
Hitoshi Yamaoka, Yoshiya Yamamoto, Eike F. Schwier, Naohito Tsujii, Masahiro Yoshida, Yu Ohta, Hiroya Sakurai, Jung-Fu Lin, Nozomu Hiraoka, Hirofumi Ishii, Ku-Ding Tsuei, Masashi Arita, Kenya Shimada, and Jun'ichiro Mizuki
Electronic structure of the heavy-fermion caged compound Ce3Pd20X6(X= Si,Ge) studied by density functional theory and photoelectron spectroscopy
Phys. Rev. B 91, 115139 – Published 30 March 2015
Hitoshi Yamaoka, Eike F. Schwier, Masashi Arita, Kenya Shimada, Naohito Tsujii, Ignace Jarrige, Jian Jiang, Hirokazu Hayashi, Hideaki Iwasawa, Hirofumi Namatame, Masaki Taniguchi, and Hideaki Kitazawa
105Pd NMR and NQR study of the cubic heavy fermion system Ce3Pd20Si6
Journal of Physics: Condensed Matter, Volume 32, Number 24 - Published 19 March 2020
I Jakovac, M Horvatić, E F Schwier, A Prokofiev, S Paschen, H Mitamura, T Sakakibara and M S Grbić
Last edit: Eike Schwier 2020-08-04
Last edit: DEBARATI PAL 2018-09-25
You-Zhao Lan*
First-principles studies of effects of layer stacking, opposite atoms, and stacking order on two-photon absorption of two-dimensional layered silicon carbide
Computational Materials Science, 151 (2018) 231
You-Zhao Lan*
Excitonic effects on the optical response of monolayer and bilayer graphene-like silicon carbide
Computational Materials Science, 138 (2017) 213–218
You-Zhao Lan
New understandings of third harmonic generation coefficient of bulksilicon: Implementation and application of the full ab initio bandstructure sum-over-states method
Computational Condensed Matter, 8(2016)22
Last edit: Youzhao Lan 2018-07-14
Ultrafast Relaxation Dynamics of the Antiferrodistortive Phase in Ca Doped SrTiO3
M. Porer, M. Fechner, E. M. Bothschafter, L. Rettig, M. Savoini, V. Esposito, J. Rittmann, M. Kubli, M. J. Neugebauer, E. Abreu, T. Kubacka, T. Huber, G. Lantz, S. Parchenko, S. Grübel, A. Paarmann, J. Noack, P. Beaud, G. Ingold, U. Aschauer, S. L. Johnson, and U. Staub,
Phys. Rev. Lett. 121, 055701 (2018)
Last edit: mfechner 2018-09-19
Dopant-related electron trap states in Lu2O3:Ta
A. Shyichuk, E. Zych
Journal of Luminescence, 214, 116583
https://doi.org/10.1016/j.jlumin.2019.116583
Role of hybridization and on-site correlations in generating plasmons in strongly correlated
La2CuO4
Muhammad Avicenna Naradipa, Paolo Emilio Trevisanutto, Teguh Citra Asmara, Muhammad Aziz Majidi, and Andrivo Rusydi
Phys. Rev. B 101, 201102(R) – Published 5 May 2020
https://doi.org/10.1103/PhysRevB.101.201102
Oxygen Vacancy, Oxygen Vacancy–Vacancy Pairs, and Frenkel Defects in Cubic Lutetium Oxide
A. Shyichuk, E. Zych
J. Phys. Chem. C 2020, 124, 28, 14945–14962
https://pubs.acs.org/doi/abs/10.1021/acs.jpcc.0c00974
Unravelling Photoinduced Interlayer Spin Transfer Dynamics in Two-Dimensional Nonmagnetic-Ferromagnetic van der Waals Heterostructures
Junjie He, Shuo Li, Arkamita Bandyopadhyay, and Thomas Frauenheim
Nano Lett. 2021, 21, 3237−3244
Optically Driven Ultrafast Magnetic Order Transitions in Two-Dimensional Ferrimagnetic MXenes
Junjie He and Thomas Frauenheim
J. Phys. Chem. Lett. 2020, 11, 15, 6219–6226
Electronic excitation spectra of cerium oxides: from ab initio dielectric response functions to Monte Carlo electron transport simulations
Andrea Pedrielli, Pablo de Vera, Paolo E. Trevisanutto, Nicola M. Pugno, Rafael Garcia-Molina, Isabel Abril, Simone Taioli, and Maurizio Dapor
Phys. Chem. Chem. Phys., 2021, 23, 19173-19187
DOI: 10.1039/D1CP01810H
In search of the ground-state crystal structure of Ta2O5 from ab initio and Monte Carlo simulations
Andrea Pedrielli, Nicola M. Pugno, Maurizio Dapor, and Simone Taioli
Computational Materials Science, Volume 216, 2023, 111828
https://doi.org/10.1016/j.commatsci.2022.11182
Variation of Superconducting Transition Temperature of YSn3 Under Negative Pressure
S. Singh, & R. Kumar
J Supercond Nov Magn 32, 1157-1162 (2019)
https://link.springer.com/article/10.1007/s10948-018-4811-8
Superconducting Properties of LaSn3 Under Positive Hydrostatic Pressure
S. Singh, & R. Kumar
J Supercond Nov Magn 32, 3431-3436 (2019)
https://link.springer.com/article/10.1007/s10948-019-5134-0
Superconductivity in YIn3 Under Positive Pressure
S. Singh, & R. Kumar, Physica C:
Physica C: Superconductivity and its applications 564, 6-10 (2019)
https://www.sciencedirect.com/science/article/pii/S0921453419300760?via%3Dihub
Electron-phonon coupling in La3In under pressure
Surinder Singh and Udomsilp Pinsook
J. Phys.: Condens. Matter 35, 245702 (2023)
https://iopscience.iop.org/article/10.1088/1361-648X/acc4fe/meta
Effect of pressure on superconductivity of LaBi3
Surinder Singh and Udomsilp Pinsook
Phys. Scr. 98, 115959 (2023)
https://iopscience.iop.org/article/10.1088/1402-4896/acfe61/meta
Last edit: TOP GUN 2023-12-01