Microscopical calculations of the optical properties of Bi2Sr2CaCu2O8

Yu A. Uspenskii, Sergey Rashkeev

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Abstract

The optical dielectric function ε{lunate}(ω) = ε{lunate}1(ω) + iε{lunate}2(ω), the reflectivity R(ω) and the electron energy-loss spectra (EELS) L(ω) =Im[- 1 ε{lunate}(ω)] are calculated for Bi2Sr2CaCu2O8 in the conventional band approach. The calculated spectra R(ω) and L(ω) are in good accordance with the experiments at high energies 5 ≤ h {combining short solidus overlay}ω≤25 eV. At lower energies we find that the threshold of interband transitions connected with the Bi atoms is positioned at 2.5 eV instead of 4 eV in the experiment. This threshold shift can be caused by the Bi 6p-spin-orbit splitting or by electronic correlations with values of the order of 1-2 eV.

Original languageEnglish
Pages (from-to)373-376
Number of pages4
JournalPhysics Letters A
Volume153
Issue number6-7
Publication statusPublished - 11 Mar 1991
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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