Josephson behavior in a metal-decorated topological-insulator Bi0.91Sb0.09
Journal Article
·
· Physical Review Letters
OSTI ID:2315081
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
We have fabricated W nanoscale clusters on a topological insulator Bi0.91Sb0.09. The W island arrays effectively induce two-dimensional superconductivity at the surface of Bi0.91Sb0.09 via the superconducting proximity effect. We find that this heterostructure behaves as a dynamic Josephson junction, which shows a Fraunhofer-like pattern of the critical current versus the applied magnetic field. Microwave irradiation experiments reveal the existence of a 4π-periodic supercurrent carried by the topological surface state. Our results open up a route to induce topological superconductivity in a topological insulator.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program
- DOE Contract Number:
- AC52-07NA27344
- OSTI ID:
- 2315081
- Report Number(s):
- LLNL--JRNL-813385; 1021261
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters; ISSN 1021261
- Country of Publication:
- United States
- Language:
- English
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