Influence of carrier lifetime on quantum criticality and superconducting Tc of (TMTSF)2ClO4

Abdelouahab Sedeki, Pascale Auban-Senzier, Shingo Yonezawa, Claude Bourbonnais, and Denis Jerome
Phys. Rev. B 98, 115111 – Published 7 September 2018

Abstract

This work presents and analyzes electrical resistivity data on the organic superconductor (TMTSF)2ClO4 and their anion-substituted alloys (TMTSF)2(ClO4)1x(ReO4)x along the least conducting c axis. Nonmagnetic disorder introduced by finite size domains of anion ordering on non-Fermi-liquid character of resistivity is investigated near the conditions of quantum criticality taking place at x=0. The evolution of the T-linear resistivity term with anion disorder shows a limited decrease in contrast with the complete suppression of the critical temperature Tc as expected for unconventional superconductivity beyond a threshold value of x. The resulting breakdown of scaling between both quantities is compared to the theoretical predictions of a linearized Boltzmann equation combined to the scaling theory of umklapp scattering in the presence of disorder-induced pair breaking for the carriers. The theory shows that quantum antiferromagnetic fluctuations, which are at the core of unconventional Cooper pairing and inelastic scattering of T-linear resistivity in these systems, are weakly affected by disorder while the phase coherence responsible for a finite Tc can be completely suppressed.

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  • Received 17 June 2018
  • Revised 21 August 2018

DOI:https://doi.org/10.1103/PhysRevB.98.115111

©2018 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Abdelouahab Sedeki1, Pascale Auban-Senzier2, Shingo Yonezawa3, Claude Bourbonnais4, and Denis Jerome2

  • 1Université Dr Tahar Moulay Saida, B.P. 138 cité ENNASR 20000, Saida, Algeria
  • 2Laboratoire de Physique des Solides (UMR 8502), Université Paris-Sud, 91405 Orsay, France
  • 3Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
  • 4Regroupement Québécois sur les Matériaux de Pointe and Institut Quantique, Département de physique, Université de Sherbrooke, Sherbrooke, Québec, Canada J1K-2R1

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Vol. 98, Iss. 11 — 15 September 2018

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