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arXiv · 1405.6801

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

Tatsuki Hashimoto·Keiji Yada·Ai Yamakage·Masatoshi Sato·Yukio Tanaka
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Abstract

We study bulk electronic states of superconducting topological insulator, which is the promising candidate for topological superconductor. 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 Cu$_x$Bi$_2$Se$_3$.

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Tatsuki Hashimoto, Keiji Yada, Ai Yamakage, Masatoshi Sato, Yukio Tanaka. 2014-05-27. Effect of Fermi surface evolution on superconducting gap in superconducting topological insulator. https://doi.org/10.1088/0953-2048/27/10/104002

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