期刊
PHYSICS LETTERS A
卷 379, 期 5, 页码 421-426出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physleta.2014.11.036
关键词
Hight-temperature cuprate superconductors; Tree-band p-d model; Spin polaron; Strong electron correlations
资金
- Russian Foundation for Basic Research (Siberia) [13-02-00523, 13-02-00909, 13-02-98013]
- Dynasty Foundation
It is demonstrated for the first time that the strong coupling between spin moments of copper ions and oxygen holes, which arises upon hybridization mixing of two hole subsystems in the Emery model, not only affects the formation of spin polaron quasiparticles but also ensures effective attraction between them via the exchange interaction. This results in the Cooper instability with d-wave pairing in a 2D ensemble of spin polaron quasiparticles. The T-x phase diagram obtained using this approach agrees well with the available experimental data. (C) 2014 Elsevier B.V. All rights reserved.
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