BSE calculations

Elk Users
John S Tse
2012-04-10
2013-06-11
  • John S Tse

    John S Tse - 2012-04-10

    I would like to confirm in a BSE calculation interband transitions between different k points are not computed, i.e. no indirect transitions.  For example the indirect gap transition in Si is not computed.

    John

     
  • John Kay Dewhurst

    Hi John,

    The BSE matrix has coupling between different k-points in order to allow for excitonic states. For the calculations of the the BSE dielectric function, only vertical transitions are allowed, i.e. using the dipole approximation.

    Hope that helps.

    Cheers,
    Kay.

     

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