New pairing mechanism in oxide superconductors

Susumu Kurihara

doi:10.1016/0921-4534(88)90264-X

New pairing mechanism in oxide superconductors

Susumu Kurihara^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

A new mechanism is proposed for electron pairing in a series of oxide superconductors Ln₁Ba₂Cu₃O_7-x (LN=Y and Lanthanide element). This mechanism takes advantage of the triple plane-chain-plane structure, with essential use of antiferromagnetic interlayer superexchange and Kondo type intralayer exchange interactions. A Cooper pair is formed between two oxygen holes belonging to neighboring Cu-O planes, via singlet-triplet excitations in the localized Cu-Cu spin pairs. This mechanism is shown to be consistent with main features of various experiments. A small but finite isotope effect is also derived.

Original language	English
Pages (from-to)	1247-1248
Number of pages	2
Journal	Physica C: Superconductivity and its Applications
Volume	153-55
Issue number	2
DOIs	https://doi.org/10.1016/0921-4534(88)90264-X
Publication status	Published - 1988 Jun
Externally published	Yes

ASJC Scopus subject areas

Condensed Matter Physics

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10.1016/0921-4534(88)90264-X

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AB - A new mechanism is proposed for electron pairing in a series of oxide superconductors Ln1Ba2Cu3O7-x (LN=Y and Lanthanide element). This mechanism takes advantage of the triple plane-chain-plane structure, with essential use of antiferromagnetic interlayer superexchange and Kondo type intralayer exchange interactions. A Cooper pair is formed between two oxygen holes belonging to neighboring Cu-O planes, via singlet-triplet excitations in the localized Cu-Cu spin pairs. This mechanism is shown to be consistent with main features of various experiments. A small but finite isotope effect is also derived.

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New pairing mechanism in oxide superconductors

Abstract

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