Suppression of superconductivity by non-magnetic disorder in the organic superconductor (TMTSF)2(ClO4)(1-x)(ReO4)x

Abstract

We present a study of the superconducting properties (Tc and Hc2) in the solid solution (TMTSF)2(ClO4)(1-x)(ReO4)x with a ReO-4 nominal concentration up to x = 6%. The dramatic suppression of Tc when the residual resistivity is increased upon alloying with no modification of the Fermi surface is the signature of non-conventional superconductivity . This behaviour strongly supports p or d wave pairing in quasi one dimensional organic superconductors. The determination of the electron lifetime in the normal state at low temperature confirms that a single particle Drude model is unable to explain the temperature dependence of the conductivity and that a very narrow zero frequency mode must be taken into account for the interpretation of the transport properties.

Received 26 January 2004 / Received in final form 17 June 2004 / Published online 3 August 2004

References in corpus (1)

• The Dependence of the Superconducting Transition Temperature of Organic Molecular Crystals on Intrinsically Non-Magnetic Disorder: a Signature of either Unconventional Superconductivity or Novel Local Magnetic Moment Formation

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• Role of the cooling rate in the stability of the superconducting phase of (TMTSF)_2ClO_4
• Competition between different order parameters in a quasi-one-dimensional superconductor
• Upper critical field divergence induced by mesoscopic phase separation in the organic superconductor (TMTSF)2ReO4
• Superconductivity in Sm-doped 1,3,5-triphenylbenzene