ECRYS - 93
J. Phys. IV France 03 (1993) C2-311-C2-314
Quasi-one-dimensional superconductors in strong magnetic fieldN. DUPUIS1, G. MONTAMBAUX1 and C.A.R. SÁ DE MELO2
1 Laboratoire de Physique des Solides, Université Paris-Sud, 91405 Orsay, France
2 Science and Technology Center for Superconductivity, Argonne National Laboratory, Materials Science Division, Argonne IL 60439, U.S.A.
We determine the phase diagram of a quasi-one-dimensional conductor (weakly coupled chains system with an open Fermi surface) in a magnetic field. The usual Ginzburg-Landau regime is followed, when the field is increased, by a cascade of superconducting phases separated by first order transitions, which ends with a strong reentrance of the superconducting phase. These new phases show a novel kind of symmetry of laminar type. The Zeeman splitting does not completely suppress the reentrance in very strong field, the ground state being in this case a Larkin-Ovchinnikov-Fulde-Ferrell state.
© EDP Sciences 1993