Vortex interaction enhanced saturation number and caging effect in a superconducting film with a honeycomb array of nanoscale holes.

Journal Article · Sun Jan 01 00:00:00 EST 2012 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.85.012505· OSTI ID:1037567

Latimer, M L; Berdiyorov, G R; Xiao, Z L; Kwok, W K; Peeters, F M ^[1]

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1. Materials Science Division

The electrical transport properties of a MoGe thin film with a honeycomb array of nanoscale holes are investigated. The critical current of the system shows nonmatching anomalies as a function of applied magnetic field, enabling us to distinguish between multiquanta vortices trapped in the holes and interstitial vortices located between the holes. The number of vortices trapped in each hole is found to be larger than the saturation number predicted for an isolated hole and shows a nonlinear field dependence, leading to the caging effect as predicted from the Ginzburg-Landau (GL) theory. Our experimental results are supplemented by numerical simulations based on the GL theory.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC02-06CH11357
• OSTI ID: 1037567
• Report Number(s): ANL/MSD/JA-72211; TRN: US201207%%369
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 85, Issue 1; ISSN 1098-0121
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRITICAL CURRENT
INTERSTITIALS
MAGNETIC FIELDS
SATURATION
SUPERCONDUCTING FILMS
THIN FILMS
TRANSPORT
VORTICES