Eur. Phys. J. B 40, 43-48 (2004)
https://doi.org/10.1140/epjb/e2004-00236-4

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

¹ Laboratoire de Physique des Solides (CNRS,UMR 8502), Université Paris-Sud, 91405 Orsay, France
² Faculté des Sciences de Tunis, LPMC, Campus Universitaire, 1060 Tunis, Tunisie
³ Laboratoire de Physique des Solides (CNRS, UPR 5), ESPCI, 75231 Paris Cedex 05, France
⁴ Polymer Department, Risø  National Laboratory, 4000 Roskilde, Denmark

Corresponding author: ^a jerome@lps.u-psud.fr

Received: 26 January 2004
Revised: 17 June 2004
Published online: 3 August 2004

Abstract

We present a study of the superconducting properties and in the solid solution   with a  nominal concentration up to . The dramatic suppression of T_c 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.