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Title: History-dependent dissipative vortex dynamics in superconducting arrays

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.
Authors:
 [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
Publication Date:
Report Number(s):
LA-UR--15-29469
Journal ID: ISSN 2469-9950
Grant/Contract Number:
AC52-06NA25396; SC0012649
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 94; Journal Issue: 2; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1337098
Alternate Identifier(s):
OSTI ID: 1337098