Electronic phase separation: Extended mean-field calculations forCuO2layers in high-Tcsuperconductors

Autor:	Martin Letz, G. S. Zavt, D. Klemm, Ernst Sigmund
Rok vydání:	1994
Předmět:	Superconductivity Physics Statistics::Theory Statistics::Applications Spins Condensed matter physics Spin polarization Binding energy Polarization (waves) Mean field theory Condensed Matter::Superconductivity Cluster (physics) Condensed Matter::Strongly Correlated Electrons Cuprate Atomic physics
Zdroj:	Physical Review B. 50:7046-7055
ISSN:	1095-3795 0163-1829
DOI:	10.1103/physrevb.50.7046
Popis:	We examine the stability of spin-polarized cluster states (ferrons) which appear by hole doping of the antiferromagnetically ordered ${\mathrm{CuO}}_{2}$ planes in the high-${\mathit{T}}_{\mathit{c}}$ cuprates. The influence of additional holes is calculated within a self-consistent mean-field-type approximation. The variation procedure for the spin polarization is extended over up to five ${\mathrm{CuO}}_{2}$ plaquettes. Different correlation terms (${\mathit{U}}_{\mathit{p}\mathit{d}}$,${\mathit{U}}_{\mathit{p}}$) affecting the cluster stability are discussed. For all cases the cluster binding energy and the polarization of the Cu spins are calculated. In addition the interaction between different clusters is discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e26563247ef386a470072032d1aa32fe https://doi.org/10.1103/physrevb.50.7046 Zobrazit plný text záznamu