Počet záznamů: 1  

Dipole matrix element approach versus Peierls approximation for optical conductivity

  1. 1.
    0381193 - FZÚ 2013 RIV US eng J - Článek v odborném periodiku
    Wissgott, P. - Kuneš, Jan - Toschi, A. - Held, K.
    Dipole matrix element approach versus Peierls approximation for optical conductivity.
    Physical Review. B. Roč. 85, č. 20 (2012), "205133-1"-"205133-9". ISSN 1098-0121
    Výzkumný záměr: CEZ:AV0Z10100521
    Klíčová slova: optical spectroscopy * dynamical mean-field theory
    Kód oboru RIV: BE - Teoretická fyzika
    Impakt faktor: 3.767, rok: 2012
    http://link.aps.org/doi/10.1103/PhysRevB.85.205133

    We develop a computational approach for calculating the optical conductivity in the augmented plane-wave basis set of WIEN2K and apply it for thoroughly comparing the full dipolematrix element calculation and the Peierls approximation. The results for SrVO3 and V2O3 show that the Peierls approximation, which is commonly used in model calculations, works well for optical transitions between the d orbitals. In a typical transition-metal oxide, these transitions are solely responsible for the optical conductivity at low frequencies. The Peierls approximation does not work, on the other hand, for optical transitions between p and d orbitals which usually became important at frequencies of a few eVs.
    Trvalý link: http://hdl.handle.net/11104/0211719

     
     
Počet záznamů: 1  

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