Linear-T scattering and pairing from antiferromagnetic fluctuations in the (TMTSF)_2X organic superconductors

Abstract

An exhaustive investigation of metallic electronic transport and superconductivity of organic superconductors (TMTSF)_2PF_6 and (TMTSF)_2ClO_4 in the Pressure-Temperature phase diagram between T=0 and 20 K and a theoretical description based on the weak coupling renormalization group method are reported. The analysis of the data reveals a high temperature domain (T\approx 20 K) in which a regular T^2 electron-electron Umklapp scattering obeys a Kadowaki-Woods law and a low temperature regime (T< 8 K) where the resistivity is dominated by a linear-in temperature component. In both compounds a correlated behavior exists between the linear transport and the extra nuclear spin-lattice relaxation due to antiferromagnetic fluctuations. In addition, a tight connection is clearly established between linear transport and T_c. We propose a theoretical description of the anomalous resistivity based on a weak coupling renormalization group determination of electron-electron scattering rate. A linear resistivity is found and its origin lies in antiferromagnetic correlations sustained by Cooper pairing via constructive interference. The decay of the linear resistivity term under pressure is correlated with the strength of antiferromagnetic spin correlations and T_c, along with an unusual build-up of the Fermi liquid scattering. The results capture the key features of the low temperature electrical transport in the Bechgaard salts.

References in corpus (6)

• 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
• Link between antiferromagnetism and superconductivity probed by nuclear spin relaxation in organic conductors
• Suppression of superconductivity by non-magnetic disorder in the organic superconductor (TMTSF)2(ClO4)(1-x)(ReO4)x
• Domain walls at the spin density wave endpoint of the organic superconductor (TMTSF)2PF6 under pressure
• Towards a consistent picture for quasi-1D organic superconductors

Cited by in corpus (15)

• A Common Thread: the pairing interaction for the unconventional superconductors
• Extended quantum criticality of low-dimensional superconductors near a spin-density-wave instability
• Organic Superconductors: when correlations and magnetism walk in
• Collective infrared excitation in rare-earth Gd${}_x$La${}_{1-x}$B${}_6$ hexaborides
• Quantum diffusion regime of the charge transport in GdB6 caused by electron and lattice instability
• Novel superconducting phenomena in quasi-one-dimensional Bechgaard salts
• Crossover from impurity-controlled to granular superconductivity in (TMTSF)2ClO4
• The metallic transport of (TMTSF)_2X organic conductors close to the superconducting phase
• Quasi one-dimensional organic conductors: from Fröhlich conductivity and Peierls insulating state to magnetically-mediated superconductivity, a retrospective
• The Seebeck coefficient in correlated low dimensional organic metals
• Superconductivity and antiferromagnetism as interfering orders in organic conductors
• Investigation of Planckian behavior in a high-conductivity oxide: PdCrO${}_2$
• Electrical transport near quantum criticality in low dimensional organic superconductors
• Influence of carrier lifetime on quantum criticality and superconducting Tc of (TMTSF)_2ClO_4
• Superconducting and spin-density wave phases probed by scanning tunneling spectroscopy in the organic conductor $(\mathrm{TMTSF}{)}_2\mathrm{Cl}{\mathrm{O}}_4$