Magnetic field induced singlet - triplet phase transition in quasi one-dimensional organic superconductors

Abstract

We 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.

6 pages, 2 figures, accepted in EPL

References in corpus (14)

• Thermal Conductivity of superconducting (TMTSF)_2ClO_4: evidence for a nodeless gap
• Possible Triplet Electron Pairing and an Anisotropic Spin Susceptibility in Organic Superconductors (TMTSF)_2 X
• Magnetic Determination of $H_{c2}$ under Accurate Alignment in (TMTSF)${}_2$ClO${}_4$
• Triplet superconducting pairing and density-wave instabilities in organic conductors
• Microscopic theory of spin-triplet $f$-wave pairing in quasi-1D organic superconductors
• Possible Fulde-Ferrell-Larkin-Ovchinnikov State in CeCoIn_5
• Impurity controlled Superconductivity/Spin Density Wave interplay in the organic superconductor : (TMTSF)\_2ClO\_4
• Coexistence of Singlet and Triplet Attractive Channels in the Pairing Interactions Mediated by Antiferromagnetic Fluctuations
• Upper critical fields of quasi-low-dimensional superconductors with coexisting singlet and triplet pairing interactions in parallel magnetic fields
• The effect of interchain interaction on the pairing symmetry competition in organic superconductors (TMTSF)${}_2$X
• Field-induced confinement in (TMTSF)2ClO4 under accurately aligned magnetic fields
• Antiferromagnetic superconductors with effective mass anisotropy in magnetic fields
• Renormalization Group calculations with k|| dependent couplings in a ladder
• Functional Renormalization Group calculation of the Fermi surface of a spin-ladder

Cited by in corpus (12)

• Strong parity mixing in the FFLO superconductivity in systems with coexisting spin and charge fluctuations
• Organic Superconductors: when correlations and magnetism walk in
• Novel superconducting phenomena in quasi-one-dimensional Bechgaard salts
• On the Origin of the Anomalous Upper Critical Field in Quasi-One-Dimensional Superconductors
• Mechanism for the Singlet to Triplet Superconductivity Crossover in Quasi-One-Dimensional Organic Conductors
• Pairing competition in a quasi-one-dimensional model of organic superconductors (TMTSF)${}_{2}X$ in magnetic field
• Experimental Evidences of Quantum Phase Transition in a Spin Cluster Compound
• Triplet superconductivity in coupled odd-gon rings
• Microscopic theory of a superconducting gap in the quasi-one-dimensional organic conductor (TMTSF)${}_2$ClO${}_4$: Model derivation and two-particle self-consistent analysis
• Competition between different order parameters in a quasi-one-dimensional superconductor
• Generic nodeless Larkin Ovchinnikov states due to singlet-triplet mixing
• Superconducting and density-wave instabilities of low dimensional conductors with a Zeeman coupling to a magnetic field