Quasi-one-dimensional superconductors in strong magnetic field
N. Dupuis, G. Montambaux, C. A. R. Sá de Melo
DOI 10.1103/PhysRevLett.70.2613 · Physical Review Letters
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Abstract
We determine the phase diagram of a quasi-one-dimensional superconductor (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 in a strong reentrance of the superconducting phase. These new phases show a novel kind of symmetry of a 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.
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