Volume 80, Number 3, November 2007
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||28 September 2007|
Magnetic-fieldinduced singlet-triplet phase transition in quasione-dimensional organic superconductors
Laboratoire de Physique des Solides, UMR 8502, CNRS Université Paris-Sud 11 - 91405 Orsay, France
2 Laboratoire de Physique de la Matière Condensée, Faculté des Sciences de Tunis - Tunisia
Accepted: 4 September 2007
We propose a theoretical model of quasione-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.
PACS: 74.70.Kn – Organic superconductors / 74.25.Op – Mixed states, critical fields, and surface sheaths / 74.20.Rp – Pairing symmetries (other than s-wave)
© Europhysics Letters Association, 2007
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.