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The electron-phonon coupling and structural instabilities in the superconducting cuprates

Abstract

A simple model for describing the electron-photon coupling in a strongly correlated electron-gas 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 is considered. The two different choices of quasi-particle statistics are shown to result in very different stability behaviour at finite doping. The connection to the tetragonal to orthorhombic structural phasetransition in (La, Ba){sub 2}CuO{sub 4} and other superconducting cuprates is discussed. (orig.).
Authors:
Smith, A; Hedegard, P [1] 
  1. Copenhagen Univ. (Denmark). Physics Lab.
Publication Date:
May 20, 1992
Product Type:
Technical Report
Report Number:
KU-HCOE-FL2-R-92-05
Reference Number:
SCA: 665411; PA: AIX-24:037307; SN: 93000977670
Resource Relation:
Other Information: PBD: 20 May 1992
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; HIGH-TC SUPERCONDUCTORS; PHONONS; BARIUM OXIDES; COPPER OXIDES; CUPRATES; ELECTRON GAS; HUBBARD MODEL; LANTHANUM OXIDES; MEAN-FIELD THEORY; PHASE TRANSFORMATIONS; 665411; BASIC SUPERCONDUCTIVITY STUDIES
OSTI ID:
10144914
Research Organizations:
Copenhagen Univ. (Denmark). H.C. Oersted Inst.
Country of Origin:
Denmark
Language:
English
Other Identifying Numbers:
Other: ON: DE93623209; TRN: DK93C0035037307
Availability:
OSTI; NTIS; INIS
Submitting Site:
DKN
Size:
[29] p.
Announcement Date:
Jul 05, 2005

Citation Formats

Smith, A, and Hedegard, P. The electron-phonon coupling and structural instabilities in the superconducting cuprates. Denmark: N. p., 1992. Web.
Smith, A, & Hedegard, P. The electron-phonon coupling and structural instabilities in the superconducting cuprates. Denmark.
Smith, A, and Hedegard, P. 1992. "The electron-phonon coupling and structural instabilities in the superconducting cuprates." Denmark.
@misc{etde_10144914,
title = {The electron-phonon coupling and structural instabilities in the superconducting cuprates}
author = {Smith, A, and Hedegard, P}
abstractNote = {A simple model for describing the electron-photon coupling in a strongly correlated electron-gas 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 is considered. The two different choices of quasi-particle statistics are shown to result in very different stability behaviour at finite doping. The connection to the tetragonal to orthorhombic structural phasetransition in (La, Ba){sub 2}CuO{sub 4} and other superconducting cuprates is discussed. (orig.).}
place = {Denmark}
year = {1992}
month = {May}
}