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arXiv · 1806.06395

Influence of carrier lifetime on quantum criticality and superconducting Tc of (TMTSF)_2ClO_4

A. Sedeki·P. Auban-Senzier·S. Yonezawa·C. Bourbonnais·D. Jerome
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Abstract

This work presents and analyzes electrical resistivity data on the organic superconductor (TMTSF)$_2$ClO$_4$ and their anion substituted alloys (TMTSF)$_2$(ClO$_4$)$_{1-x}$(ReO$_4$)$_x$ along the least conducting $c^\star$ 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. 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 $T_c$ 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.

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A. Sedeki, P. Auban-Senzier, S. Yonezawa, C. Bourbonnais, D. Jerome. 2018-06-17. Influence of carrier lifetime on quantum criticality and superconducting Tc of (TMTSF)_2ClO_4. https://doi.org/10.1103/physrevb.98.115111

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