Elucidation of the symmetry of superconducting gap of topological superconductor CuxBi2Se3 and other novel materials

发现了两种类似于超导拓扑绝缘体CuxBi2Se3的具有时间反转不变性的超导体：一种是In掺杂的超导拓扑晶体绝缘体Sn1-xInxTe，另一种是将铜嵌入由Bi2Se3(拓扑绝缘体)和PbSe(普通绝缘体)组成的拓扑绝缘体异质结中合成的Cux(PbSe)5(Bi2Se3)6超导体。点接触光谱和比热测量使我们能够阐明这些材料中超导带隙的对称性。基于所揭示的性质，我们提出了Sn1-xInxTe和Cux(PbSe)5(Bi2Se3)6作为候选材料，为研究拓扑超导电性搭建了一个平台，为相关领域的发展做出了贡献。

Two new superconductors with time-reversal invariance similar to a superconducting topological insulator CuxBi2Se3 have been discovered: one of them is a superconducting In-doped topological crystalline insulator Sn1-xInxTe; the other is a superconductor Cux(PbSe)5(Bi2Se3)6 synthesized by intercalating Cu into a topological insulator heterostructure consisting of Bi2Se3 (topological insulator) and PbSe (ordinary insulator). The point-contact spectroscopy and specific heat measurements allowed us to elucidate the symmetry of the superconducting gaps in these materials. Based on the revealed properties we proposed Sn1-xInxTe and Cux(PbSe)5(Bi2Se3)6 as candidate materials that can build a platform for the study of topological superconductivity, contributing to the development of the relevant field.