McMillan-Rowell Like Oscillations in a Superconductor-InAs/GaSb-Superconductor Junction

Shi, Xiaoyan; Yu, Wenlong; Hawkins, Samuel D.; Klem, John F.; Pan, Wei

doi:10.1063/1.4928186

Title: McMillan-Rowell Like Oscillations in a Superconductor-InAs/GaSb-Superconductor Junction

Journal Article · Tue Aug 04 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4928186· OSTI ID:1235300

Shi, Xiaoyan ^[1]; Yu, Wenlong ^[1]; Hawkins, Samuel D. ^[1]; Klem, John F. ^[1]; Pan, Wei ^[1]

Sandia National Lab. (SNL-NM), Albuquerque, NM (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.

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Research Organization:: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC04-94AL85000

OSTI ID:: 1235300

Alternate ID(s):: OSTI ID: 1421191

Report Number(s):: SAND2015-7565J; 603525

Journal Information:: Applied Physics Letters, Vol. 107, Issue 05; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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References (28)

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