Doping-dependent quasiparticle band structure in cuprate superconductors

1996/11/05 by R. Eder, Y. Ohta, G. A. Sawatzky · 4 citations
Chemistry · Physics and Astronomy · #Advanced Condensed Matter Physics #Inorganic Fluorides and Related Compounds #Physics of Superconductivity and Magnetism #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.55.r3414

4 pages, Revtex, with 4 embedded eps figures. Hardcopies of figures (or the entire manuscript) can be obtained by e-mail request to [email protected]

arxiv created 1996/11/05 · openalex publication_date 1997/02/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

We present an exact diagonalization study of the single-particle spectral function in the so-called t-t^|IH-t\ensuremath''-J model in two dimensions. As a key result, we find that hole doping leads to a major reconstruction of the quasiparticle band structure near (\ensuremathπ,0): whereas for the undoped system the quasiparticle states near (\ensuremathπ,0) are deep below the top of the band near (\ensuremathπ/2,\ensuremathπ/2), hole doping shifts these states up to E_F, resulting in extended flat band regions close to E_F and around (\ensuremathπ,0).

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