Effect of Fermi surface evolution on superconducting gap in superconducting topological insulator
Effect of Fermi surface evolution on superconducting gap in superconducting topological insulator
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DOI：
10.1088/0953-2048/27/10/104002
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发表时间：
2014-05
影响因子：
3.6
通讯作者：
T. Hashimoto;K. Yada;A. Yamakage;M. Sato;Yukio Tanaka
中科院分区：
文献类型：
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作者：
T. Hashimoto;K. Yada;A. Yamakage;M. Sato;Yukio Tanaka
我们研究了超导拓扑绝缘体的体电子态，它是一种很有前途的候选拓扑超导体。最近的实验表明，三维费米面演化为二维费米面。我们发现，费米面上的超导能隙结构随着这一演化而发生系统的变化。结果表明，体电子性质，如自旋晶格驰豫速率和比热，依赖于费米面的形状和能隙函数的类型。这些结果为确定CuxBi2Se3的配对对称性提供了指导。
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.