Triplet superconducting pairing and density-wave instabilities in organic conductors

Abstract

Using a renormalization group approach, we determine the phase diagram of an extended quasi-one-dimensional electron gas model that includes interchain hopping, nesting deviations and both intrachain and interchain repulsive interactions. We find a close proximity of spin-density- and charge-density-wave phases, singlet d-wave and triplet f-wave superconducting phases. There is a striking correspondence between our results and recent puzzling experimental findings in the Bechgaard salts, including the coexistence of spin-density-wave and charge-density-wave phases and the possibility of a triplet pairing in the superconducting phase.

4 pages, 5 eps figures

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• Theoretical Aspects of Charge Correlations in $\theta$-(BEDT-TTF)${}_{2}X$
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• Novel superconducting phenomena in quasi-one-dimensional Bechgaard salts
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• Quasi one-dimensional organic conductors: from Fröhlich conductivity and Peierls insulating state to magnetically-mediated superconductivity, a retrospective
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• 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
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• Competition between different order parameters in a quasi-one-dimensional superconductor
• Different types of the dimensional crossover in the quasi-one-dimensional spinless fermion systems
• Superconducting and density-wave instabilities of low dimensional conductors with a Zeeman coupling to a magnetic field
• Influence of carrier lifetime on quantum criticality and superconducting Tc of (TMTSF)_2ClO_4
• Possible Electric-Field-Induced Superconducting States in Doped Silicene
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• A Renormalization Group Approach for Highly Anisotropic Fermion systems