The metallic transport of (TMTSF)_2X organic conductors close to the superconducting phase

Abstract

Comparing resistivity data of quasi-one dimensional superconductors (TMTSF)_2PF_6 and (TMTSF)_2ClO_4 along the least conducting c*-axis and along the high conductivity a -axis as a function of temperature and pressure, a low temperature regime is observed in which a unique scattering time governs transport along both directions of these anisotropic conductors. However, the pressure dependence of the anisotropy implies a large pressure dependence of the interlayer coupling. This is in agreement with the results of first-principles DFT calculations implying methyl group hyperconjugation in the TMTSF molecule. In this low temperature regime, both materials exhibit for rc a temperature dependence aT + bT^2. Taking into account the strong pressure dependence of the anisotropy, the T-linear rc is found to correlate with the suppression of the superconducting Tc, in close analogy with ra data. This work is revealing the domain of existence of the 3D coherent regime in the generic (TMTSF)_2X phase diagram and provides further support for the correlation between T-linear resistivity and superconductivity in non-conventional superconductors.

References in corpus (9)

• Scattering and Pairing in Cuprate Superconductors
• Correlation between linear resistivity and $T_c$ in the Bechgaard salts and the pnictide superconductor Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Anomalous In-Plane Anisotropy of the Onset of Superconductivity in (TMTSF)2ClO4
• The B -> D* l nu form factor at zero recoil from three-flavor lattice QCD: A model independent determination of |V_cb|
• Link between antiferromagnetism and superconductivity probed by nuclear spin relaxation in organic conductors
• Domain walls at the spin density wave endpoint of the organic superconductor (TMTSF)2PF6 under pressure
• Persistence to high temperatures of interlayer coherence in an organic superconductor
• Linear-T scattering and pairing from antiferromagnetic fluctuations in the (TMTSF)_2X organic superconductors
• Towards a consistent picture for quasi-1D organic superconductors

Cited by in corpus (9)

• Zero-field Quantum Critical Point in CeCoIn${}_5$
• Extended quantum criticality of low-dimensional superconductors near a spin-density-wave instability
• Organic Superconductors: when correlations and magnetism walk in
• Quantum Batteries: A Materials Science Perspective
• Crossover from impurity-controlled to granular superconductivity in (TMTSF)2ClO4
• Novel superconducting phenomena in quasi-one-dimensional Bechgaard salts
• Quasi one-dimensional organic conductors: from Fröhlich conductivity and Peierls insulating state to magnetically-mediated superconductivity, a retrospective
• Evolution of shape and volume fraction of superconducting domains with temperature and anion disorder in (TMTSF)${}_2$ClO${}_4$
• Influence of carrier lifetime on quantum criticality and superconducting Tc of (TMTSF)_2ClO_4