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Title: History-dependent dissipative vortex dynamics in superconducting arrays

Journal Article · · Physical Review B
 [1];  [1];  [2];  [1];  [1]
  1. University of Illinois at Urbana-Champaign, Urbana, IL (United States). Department of Physics and Frederick Seitz Materials Research Laboratory
  2. University of Illinois at Urbana-Champaign, Urbana, IL (United States). Department of Physics and Frederick Seitz Materials Research Laboratory; Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Condensed Matter and Magnet Science Group
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In this study, we perform current (I)-voltage (V) measurements on low resistance superconductor-normal-superconductor arrays in finite magnetic fields, focusing on the dilute vortex population regime. We observe significant deviations from predicted behavior, notably the absence of a differential resistance peak near the vortex depinning current, and a broad linear I-V region with an extrapolated I intercept equal to the depinning current. Comparing these results to an overdamped molecular vortex model, we find that this behavior can be explained by the presence of a history-dependent dissipative force. Lastly, this approach has not been considered previously, to our knowledge, yet it is crucial for obtaining a correct description of the vortex dynamics in superconducting arrays.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC52-06NA25396; SC0012649
OSTI ID:
1337098
Alternate ID(s):
OSTI ID: 1262460
Report Number(s):
LA-UR-15-29469
Journal Information:
Physical Review B, Vol. 94, Issue 2; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

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