Effect of Fermi surface evolution on superconducting gap in superconducting topological insulator

被引:15
作者
Hashimoto, Tatsuki [1 ]
Yada, Keiji [1 ]
Yamakage, Ai [1 ]
Sato, Masatoshi [1 ]
Tanaka, Yukio [1 ]
机构
[1] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648603, Japan
关键词
topological superconductor; topological insulator; superconducting topological insulator; pairing symmetry; bulk electronic properties; SINGLE DIRAC CONE; TUNNELING SPECTROSCOPY; CONDUCTANCE;
D O I
10.1088/0953-2048/27/10/104002
中图分类号
O59 [应用物理学];
学科分类号
摘要
We study the bulk electronic states of a superconducting topological insulator, which is a promising candidate topological superconductors. Recent experiments suggest that the three-dimensional Fermi surface evolves into two-dimensional one. We show that the superconducting energy gap structure on the Fermi surface systematically changes with this evolution. It is clarified that the bulk electronic properties, such as spin-lattice relaxation rate and specific heat, depend on the shape of the Fermi surface and the type of the energy gap function. These results serve as a guide to determine the pairing symmetry of CuxBi2Se3.
引用
收藏
页数:9
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