Prediction of the in-gap states above the top of the valence band in undoped insulating cuprates due to the spin-polaron effect

2003/10/20 by S. G. Ovchinnikov, Sergei G Ovchinnikov, A. A. Borisov +5 · 2 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Chemical and Physical Properties of Materials #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1088/0953-8984/16/8/l04

published as Journal of Physics: Condensed Matter, volume 16, issue 8, pages L93 - L100 (3 March 2004) · 5 pages, 2 figures

arxiv created 2003/10/20 · openalex publication_date 2004/02/16 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30

Abstract

In the framework of the generalized tight binding method we have calculated the quasiparticle band structure and the spectral functions of the undoped cuprates such as La 2 CuO 4 , Sr 2 CuO 2 Cl 2 etc. Due to spin fluctuations the in-gap state appears above the top of the valence band in the undoped antiferromagnetic insulator similar to in-gap states induced by hole doping. In the ARPES experiments the in-gap states can be detected as weak low energy satellites.

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• Dominance of many-body effects over the one-electron mechanism for band structure doping dependence in Nd2−xCexCuO4: the LDA+GTB approach
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