The true nature of high-temperature superconductivity

Document Type

Conference Proceeding

Publication Date

12-1-2006

Abstract

The question of whether high-temperature superconductivity is s-wave or d-wave has been resolved in favor of a nodeless gap function consistent with s-wave pairing [Phys. Rev. B 69, 174505 (2004)]. In the case of YBa 2Cu3O7, where the CuO2 and the CuO layers both contain Cu d-bands, this result implies that the superconducting hole condensate resides in the BaO layers. Thus the theory for YBa 2Cu3O7 also describes systems without cuprate-planes, such as doped Ba2YRuO6 (Tc ∼ 93 K) and materials such as GdSr2Cu2RuO8 or Gd2-zCezSr2Cu2RuO10 with onset Tc's near 45 K, whose cuprate-planes are either weak-ferromagnetic or antiferromagnetic, but whose BaO or SrO layers superconduct. Clearly high-temperature superconductivity (1) is in BaO or SrO layers, or in interstitial regions, rather than in cuprate-planes, (2) is s-wave, not d-wave, and (3) usually involves unit cells with both normal and superconducting planes. © 2006 American Institute of Physics.

Identifier

33947493219 (Scopus)

ISBN

[0735403473, 9780735403475]

Publication Title

Aip Conference Proceedings

External Full Text Location

https://doi.org/10.1063/1.2354831

e-ISSN

15517616

ISSN

0094243X

First Page

555

Last Page

556

Volume

850

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