N. Belmechri et al 2007 EPL 80 37004 doi:10.1209/0295-5075/80/37004
N. Belmechri1, G. Abramovici1, M. Héritier1, S. Haddad2 and S. Charfi-Kaddour2
Show affiliationsWe propose a theoretical model of quasi–one-dimensional superconductors, with attractive electron-electron interactions dominant in the singlet d-wave channel and sub-dominant in the p-wave channel. We discuss, in the mean-field approximation, the effect of a magnetic field applied perpendicularly to the direction of the lowest conductivity. The lowest free energy phase corresponds to a singlet d-wave symmetry in low fields, but to a triplet symmetry in high fields. A first-order singlet-triplet phase transition is expected at moderate applied fields of a few teslas. We propose to ascribe the recent critical field and NMR experimental data, observed in superconducting (TMTSF)2ClO4 to such an effect.
74.20.Rp Pairing symmetries (other than s-wave)
Issue 3 (November 2007)
Received 1 August 2007, accepted for publication 4 September 2007
Published 28 September 2007
N. Belmechri et al 2007 EPL 80 37004
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