Proximity effect at superconducting Sn-Bi2Se3 interface

Article

关键词: TOPOLOGICAL INSULATORS;    ANDREEV-REFLECTION;    SURFACE;    STATES;    MICROJUNCTIONS;    CONDUCTANCE;    TRANSITION;    TRANSPORT;    JUNCTIONS;    SR2RUO4;   

DOI  :  10.1103/PhysRevB.85.104508

来源: SCIE

【 摘 要 】

We have investigated the conductance spectra of Sn-Bi2Se3 interface junctions down to 250mK and in different magnetic fields. A number of conductance anomalies were observed below the superconducting transition temperature of Sn, including a small gap that is different from that of Sn, and a zero-bias conductance peak that increases at lower temperatures. We discussed the possible origins of the smaller gap and the zero-bias conductance peak. These phenomena support the idea that a proximity-effect-induced chiral superconducting phase is formed at the interface between the superconducting Sn and the strong spin-orbit coupling material Bi2Se3.

【 授权许可】

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