Publication Date:
2015-10-08
Description:
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.
Print ISSN:
0021-8979
Electronic ISSN:
1089-7550
Topics:
Physics
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