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

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

2003-04-07

arxiv.org/abs/cond-mat/0304147v1

Journal of Magnetism and Magnetic Materials, Volumes 272-276, Supplement 1, May 2004, Pages E575-E577

Physics

Condensed Matter

Strongly Correlated Electrons

Submitted to ICM 2003 Conference 3 pages, 2 figures

Scientific paper

10.1016/j.jmmm.2003.12.645

In the present work the multiband p-d model for $CuO_2$-layer is treated. It was shown that for the realistic set of parameters besides Zhang-Rice two-particle singlet 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.

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