Proximity effect at superconducting Sn-Bi2Se3 interface

Details Proximity effect at superconducting Sn-Bi2Se3 interface Proximity effect at superconducting Sn-Bi2Se3 interface

2011-05-02

arxiv.org/abs/1105.0229v3

Physical Review B 85, 104508 (2012)

Physics

Condensed Matter

Superconductivity

7 pages, 8 figures

Scientific paper

10.1103/PhysRevB.85.104508

We have investigated the conductance spectra of Sn-Bi2Se3 interface junctions down to 250 mK and in different magnetic fields. A number of conductance anomalies were observed below the superconducting transition temperature of Sn, including a small gap different from that of Sn, and a zero-bias conductance peak growing up at lower temperatures. We discussed the possible origins of the smaller gap and the zero-bias conductance peak. These phenomena support 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.

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