Modeling tunneling for the unconventional superconducting proximity effect

Zareapour, Parisa; Xu, Jianwei; Zhao, Shu Yang F.; Jain, Achint; Xu, Zhijun; Liu, T. S.; Gu, G. D.; Burch, Kenneth S.

doi:10.1088/0953-2048/29/12/125006

Title: Modeling tunneling for the unconventional superconducting proximity effect

Journal Article · Wed Oct 12 00:00:00 EDT 2016 · Superconductor Science and Technology

DOI:https://doi.org/10.1088/0953-2048/29/12/125006· OSTI ID:1358009

Zareapour, Parisa ^[1]; Xu, Jianwei ^[1]; Zhao, Shu Yang F. ^[1]; Jain, Achint ^[1]; Xu, Zhijun ^[2]; Liu, T. S. ^[3]; Gu, G. D. ^[2];

^[4]

Univ. of Toronto, ON (Canada). Department of Physics and Institute for Optical Sciences
Brookhaven National Lab. (BNL), Upton, NY (United States). Department of Condensed Matter Physics and Materials Science (CMPMS)
Brookhaven National Lab. (BNL), Upton, NY (United States). Department of Condensed Matter Physics and Materials Science (CMPMS); North University of China (China). School of Chemical Engineering and Environment
Univ. of Toronto, ON (Canada). Department of Physics and Institute for Optical Sciences; Boston College, Chestnut Hill, MA (United States). Department of Physics

Recently there has been reinvigorated interest in the superconducting proximity effect, driven by predictions of the emergence of Majorana fermions. To help guide this search, we have developed a phenomenological model for the tunneling spectra in anisotropic superconductor-normal metal proximity devices. We combine successful approaches used in s-wave proximity and standard d-wave tunneling to reproduce tunneling spectra in d-wave proximity devices, and clarify the origin of various features. Different variations of the pair potential are considered, resulting from the proximity-induced superconductivity. Furthermore, the effective pair potential felt by the quasiparticles is momentum-dependent in contrast to s-wave superconductors. The probabilities of reflection and transmission are calculated by solving the Bogoliubov equations. Our results are consistent with experimental observations of the unconventional proximity effect and provide important experimental parameters such as the size and length scale of the proximity induced gap, as well as the conditions needed to observe the reduced and full superconducting gaps.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)

Grant/Contract Number:: SC00112704; DMR-1410846; 2009-BNL-PM015

OSTI ID:: 1358009

Report Number(s):: BNL-113802-2017-JA; R&D Project: PO010; KC0201060

Journal Information:: Superconductor Science and Technology, Vol. 29, Issue 12; ISSN 0953-2048

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 3 works

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Title: Modeling tunneling for the unconventional superconducting proximity effect

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