Giant supercurrent states in a superconductor-InAs/GaSb-superconductor junction

Journal Article · Wed Oct 07 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4932644· OSTI ID:22492771

Shi, Xiaoyan; Pan, W.; Hawkins, S. D.; Klem, J. F. ^[1]; Yu, Wenlong; Jiang, Zhigang ^[2]; Andrei Bernevig, B. ^[3]

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1. Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)
2. School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332 (United States)
3. Department of Physics, Princeton University, Princeton, New Jersey 08544 (United States)

Superconductivity in topological materials has attracted a great deal of interest in both electron physics and material sciences since the theoretical predictions that Majorana fermions can be realized in topological superconductors. Topological superconductivity could be realized in a type II, band-inverted, InAs/GaSb quantum well if it is in proximity to a conventional superconductor. Here, we report observations of the proximity effect induced giant supercurrent states in an InAs/GaSb bilayer system that is sandwiched between two superconducting tantalum electrodes to form a superconductor-InAs/GaSb-superconductor junction. Electron transport results show that the supercurrent states can be preserved in a surprisingly large temperature-magnetic field (T – H) parameter space. In addition, the evolution of differential resistance in T and H reveals an interesting superconducting gap structure.

• OSTI ID: 22492771
• Journal Information: Journal of Applied Physics, Vol. 118, Issue 13; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRONS
GALLIUM ANTIMONIDES
INDIUM ARSENIDES
MAGNETIC FIELDS
MATERIALS
PROXIMITY EFFECT
QUANTUM WELLS
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTIVITY
SUPERCONDUCTORS