McMillan-Rowell like oscillations in a superconductor-InAs/GaSb-superconductor junction

Journal Article · Mon Aug 03 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4928186· OSTI ID:22489056

Shi, Xiaoyan; Yu, Wenlong; Hawkins, S. D.; Klem, J. F.; Pan, W. ^[1]

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1. Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)

We have fabricated a superconductor (Ta)-InAs/GaSb bilayer-superconductor (Ta) junction device that has a long mean free path and can preserve the wavelike properties of particles (electrons and holes) inside the junction. Differential conductance measurements were carried out at low temperatures in this device, and McMillan-Rowell like oscillations (MROs) were observed. Surprisingly, a much larger Fermi velocity, compared to that from Shubnikov-de Haas oscillations, was obtained from the frequency of MROs. Possible mechanisms are discussed for this discrepancy.

• OSTI ID: 22489056
• Journal Information: Applied Physics Letters, Vol. 107, Issue 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
GALLIUM ANTIMONIDES
HOLES
INDIUM ARSENIDES
LAYERS
MEAN FREE PATH
OSCILLATIONS
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTORS
TUNNEL JUNCTIONS