Nodal Superconducting Order Parameter and Thermodynamic Phase Diagram of (TMTSF)2ClO4

Details Nodal Superconducting Order Parameter and Thermodynamic Phase Diagram of (TMTSF)2ClO4 Nodal Superconducting Order Parameter and Thermodynamic Phase Diagram of (TMTSF)2ClO4

2011-12-27

arxiv.org/abs/1112.5974v1

Phys. Rev. B 85, 140502(R) (2012)

Physics

Condensed Matter

Superconductivity

7 pages, 7 figures, including Supplemental Information added at the end of the manuscript

Scientific paper

10.1103/PhysRevB.85.140502

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 for the first time in Q1D systems, by discriminating between the Fermi wavevectors 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 further elucidation of anomalous superconducting phenomena in (TMTSF)2X.

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