Structural instabilities in the t-J model

Anders Smith, Per Hedegård

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Abstract

A simple model for including the electron-phonon coupling in the t-J model is introduced. A general framework for computing the dynamical matrix is presented and a number of electronic mean-field states in the t-J model are considered. The two different choices of quasiparticle statistics are shown to result in very different stability behavior at finite doping. The connection to the tetragonal-to-orthorhombic structural phase transition in (La,Ba)2CuO4 and other superconducting cuprates is discussed. © 1993 The American Physical Society
Original languageEnglish
JournalPhysical Review B Condensed Matter
Volume47
Pages (from-to)8039-8049
ISSN0163-1829
DOIs
Publication statusPublished - 1993
Externally publishedYes

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