Quasi-one-dimensional superconductors: from weak to strong magnetic field

Abstract

We discuss the possible existence of a superconducting phase at high magnetic field in organic quasi-one-dimensional conductors. We consider in particular (i) the formation of a Larkin-Ovchinnikov-Fulde-Ferrell state, (ii) the role of a temperature-induced dimensional crossover occuring when the transverse coherence length ${\xi }_z(T)$ becomes of the order of the lattice spacing, and (iii) the effect of a magnetic-field-induced dimensional crossover resulting from the localization of the wave functions at high magnetic field. In the case of singlet spin pairing, only the combination of (i) and (iii) yields a picture consistent with recent experiments in the Bechgaard salts showing the existence of a high-field superconducting phase. We point out that the vortex lattice is expected to exhibit unusual characteristics at high magnetic field.

arXiv commentTo be published in Journal of Superconductivity, Proceedings of the Workshop on "Exactly Aligned Magnetic Field Effects in Low-Dimensional Superconductors" (Kyoto, Nov. 1998)

References in corpus (3)

• Larkin-Ovchinnikov-Fulde-Ferrell state in quasi-one-dimensional superconductors
• Superconductivity of Quasi-One-Dimensional Electrons in Strong Magnetic Field
• Thermodynamics and Excitation Spectrum of a Quasi-One-Dimensional Superconductor in a High Magnetic Field