Spin fluctuations influence on quasiparticle spectrum of realistic p-d model

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:272

Article

Korshunov, Maxim M. ; Ovchinnikov, Sergei G. ; Sherman, Alexei V.

关键词: strongly correlated electron systems;    high-T-c superconductivity;    spin fluctuations;    p-d model;   

DOI  :  10.1016/j.jmmm.2003.12.645

来源: Elsevier

【 摘 要 】

In the present work the multiband p - d model for CuO2-layer is treated. It was shown that for the realistic set of parameters besides Zhang - Rice two-particle singlet state there is non-negligible contribution of two- particle triplet state to the top of the valence band. Also shown, that to gain quantitative agreement with experimental data the minimal approximation should include the spin fluctuations beyond the Hubbard-I scheme. Quasiparticle spectrum, obtained in this approximation, is in fairly good agreement with ARPES data on Bi2212 High - T-c compound. (C) 2003 Elsevier B. V. All rights reserved.

【 授权许可】

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