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Title: Zero bias anomaly in Andreev reflection spectroscopy

Zero bias anomalies have been observed in point contact Andreev reflection spectroscopy using conventional superconductors, and they cannot be suppressed by a highly spin-polarized current. By systematically varying the size of the point contact, the anomalies are found to be evolved from conductance dips outside the superconducting gap. Furthermore, these anomalies, which depend on the size of the interface, are not intrinsic to the superconductors but due to a large resistance change when the contact region is driven to normal by an Oersted field.
Authors:
 [1] ;  [1] ; ORCiD logo [1] ;  [1] ;  [1] ; ORCiD logo [1]
  1. Arizona State Univ., Tempe, AZ (United States)
Publication Date:
Grant/Contract Number:
SC0012670
Type:
Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 120; Journal Issue: 16; Related Information: SHINES partners with University of California, Riverside (lead); Arizona State University; Colorado State University; Johns Hopkins University; University of California Irvine; University of California Los Angeles; University of Texas at Austin; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Research Org:
Energy Frontier Research Centers (EFRC), Washington, D.C. (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; phonons; thermal conductivity; thermoelectric; spin dynamics; spintronics
OSTI Identifier:
1388935
Alternate Identifier(s):
OSTI ID: 1330115