Triplet electron pairing and anisotropic spin susceptibility in organic superconductors

Andrei G Lebed, K. Machida

Research output: Contribution to journalArticle

90 Citations (Scopus)

Abstract

We argue that the (Formula presented) compound under pressure is likely a triplet superconductor with a vector order parameter (Formula presented) It corresponds to an anisotropic spin susceptibility at (Formula presented) where (Formula presented) is its value in a metallic phase. (The spin-quantization axis, z, is parallel to a so-called (Formula presented) axis.) We show that the suggested order parameter explains why the upper critical field along the (Formula presented) axis exceeds all paramagnetic limiting fields, including that for a nonuniform superconducting state, whereas the upper critical field along the a axis (Formula presented) is limited by the Pauli paramagnetic effects [I. J. Lee, M. J. Naughton, G. M. Danner, and P. M. Chaikin, Phys. Rev. Lett. 78, 3555 (1997)]. The triplet order parameter is in agreement with the recent Knight shift measurements by I. J. Lee et al. as well as with the early results on a destruction of superconductivity by nonmagnetic impurities and on the absence of the Hebel-Slichter peak in the NMR relaxation rate.

Original languageEnglish (US)
Pages (from-to)R795-R798
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume62
Issue number2
DOIs
StatePublished - Jan 1 2000
Externally publishedYes

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organic superconductors
Superconductivity
Superconducting materials
Nuclear magnetic resonance
Impurities
magnetic permeability
Electrons
electrons
nuclear magnetic resonance
destruction
superconductivity
impurities

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Triplet electron pairing and anisotropic spin susceptibility in organic superconductors. / Lebed, Andrei G; Machida, K.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 62, No. 2, 01.01.2000, p. R795-R798.

Research output: Contribution to journalArticle

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