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Nodal superconducting order parameter and thermodynamic phase diagram of (TMTSF)2ClO4

Shingo Yonezawa, Yoshiteru Maeno, Klaus Bechgaard, and Denis Jérome
Phys. Rev. B 85, 140502(R) – Published 3 April 2012
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Abstract

The organic materials (TMTSF)2X are unique unconventional superconductors with archetypal quasi-one-dimensional (Q1D) electronic structures. Here, based on our comprehensive field-angle-resolved calorimetry of (TMTSF)2ClO4, we succeeded in mapping the nodal gap structure by discriminating between the Fermi wave vectors and Fermi velocities. In addition, the thermodynamic phase diagrams of (TMTSF)2ClO4 for all principal field directions are obtained. These findings, providing strong evidence of nodal spin-singlet superconductivity, serves as solid bases for the further elucidation of anomalous superconducting phenomena in (TMTSF)2X.

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  • Received 31 August 2011

DOI:https://doi.org/10.1103/PhysRevB.85.140502

©2012 American Physical Society

Authors & Affiliations

Shingo Yonezawa1,*, Yoshiteru Maeno1, Klaus Bechgaard2, and Denis Jérome3

  • 1Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
  • 2Department of Chemistry, Oersted Institute, Universitetsparken 5, 2100 Copenhagen, Denmark
  • 3Laboratoire de Physique des Solides (UMR 8502), Université Paris-Sud, 91405 Orsay, France

  • *yonezawa@scphys.kyoto-u.ac.jp

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Issue

Vol. 85, Iss. 14 — 1 April 2012

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