Onset of a Two-Dimensional Superconducting Phase in a Topological-Insulator–Normal-Metal Junction Fabricated by Ion-Beam Techniques
Journal Article
·
· Physical Review Letters
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Inducing superconductivity in a topological insulator can lead to novel quantum effects. However, experimental approaches to turn a topological insulator into a superconductor are limited. Here, we report on superconductivity in topological insulator Bi0.91Sb0.09 induced via focused ion-beam deposition of a Pt thin film. The superconducting phase exhibits a Berezinski-Kosterlitz-Thouless transition, demonstrative of its two-dimensional character. From the in-plane upper critical field measurements, we estimate the superconducting thickness to be ~17 nm for a 5.5-μm-thick sample. Our results provide evidence that the interface superconductivity could originate from the surface states of Bi0.91Sb0.09.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC)
- Grant/Contract Number:
- AC52-07NA27344; 15-LW-018; 16-SI-004; AC02-05CH11231
- OSTI ID:
- 1465266
- Alternate ID(s):
- OSTI ID: 1460484; OSTI ID: 1506337
- Report Number(s):
- LLNL-JRNL-746859; PRLTAO; 931609; TRN: US1902459
- Journal Information:
- Physical Review Letters, Vol. 121, Issue 3; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Classifying Induced Superconductivity in Atomically Thin Dirac-Cone Materials
|
journal | September 2019 |
DC Self-Field Critical Current in Superconductor/Dirac-Cone Material/Superconductor Junctions
|
journal | November 2019 |
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Related Subjects
36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BKT transition
conductivity
impurities in superconductors
superconducting fluctuations
superconducting phase transition
topological insulators
bilayer films
low-temperature superconductors
topological superconductors
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BKT transition
conductivity
impurities in superconductors
superconducting fluctuations
superconducting phase transition
topological insulators
bilayer films
low-temperature superconductors
topological superconductors