Spin-polaron pairing and high-temperature superconductivity

Hiroshi Kamimura; Shunichi Matsuno; Riichiro Saito

doi:10.1016/0038-1098(88)91046-0

Spin-polaron pairing and high-temperature superconductivity

Hiroshi Kamimura, Shunichi Matsuno, Riichiro Saito

Research output: Contribution to journal › Article

33 Citations (Scopus)

Abstract

We show that in superconducting materials with CuO₂ layers spin-polarons associated with itinerant holes in the e_v band (Cu dz² - Opπ band,) are created by strong intra-atomic exchange interaction (Hund's coupling) with localized dx²-y² holes. Then the interplay of Hund's coupling and superexchange between Cu²⁺(dx²-y²) spins gives rise to an attractive exchange interaction between spin-polarons, which leads to the formation of spin-singlet spin-polarons pairs. This contributes to high temperature superconductivity. By solving an gap equation it is shown that the s-wave pairing reproduces the observed x dependence of T_c as well as the right magnitudes of T_c in (La_1-xSr_x)₂CuO₄ satisfactorily.

Original language	English
Pages (from-to)	363-367
Number of pages	5
Journal	Solid State Communications
Volume	67
Issue number	4
DOIs	https://doi.org/10.1016/0038-1098(88)91046-0
Publication status	Published - 1988 Jul
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Materials Chemistry

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Kamimura, H., Matsuno, S., & Saito, R. (1988). Spin-polaron pairing and high-temperature superconductivity. Solid State Communications, 67(4), 363-367. https://doi.org/10.1016/0038-1098(88)91046-0

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