Extended analysis of the field-angle-dependent heat capacity of (TMTSF)2ClO4 toward identification of the superconducting gap structure

10th International Conference on Materials and Mechanisms of Superconductivity

Yonezawa, Shingo^1 ; Maeno, Yoshiteru^1 ; Jérome, Denis^2

Department of Physics, Graduate School of Science, Kyoto University, Japan^1

Laboratoire de Physique des Solides, Université Paris-Sud, Orsay, France^2

关键词: Extended analysis;    Field angle;    Field-angle-dependent;    Line nodes;    Quasi-one dimensional;    Quasiparticle excitations;    Superconducting gap structure;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/449/1/012032/pdf
DOI  :  10.1088/1742-6596/449/1/012032

来源: IOP

【 摘 要 】

In this paper, we present detailed analyses of the field-angle dependence of the heat capacity of the quasi-one-dimensional superconductor (TMTSF)2ClO4 with various models of superconducting gap structure. We clarify that the superconducting gap structure with line nodes at ky ±0.25b* is the only structure that is consistent with our experiment, irrespective of the value of the anion gap. The observed field-angle dependence of the heat capacity indicates that two of the four nodes mainly contribute to the quasiparticle excitation.