Phase-Slip Avalanches in the Superflow of {sup 4}He through Arrays of Nanosize Apertures

Journal Article · Fri Apr 27 00:00:00 EDT 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.98.175301· OSTI ID:20951280

Pekker, David; Barankov, Roman; Goldbart, Paul M ^[1]

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1. Department of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801-3080 (United States)

In response to recent experiments by the Berkeley group, we construct a model of superflow through an array of nanosize apertures that incorporates two basic ingredients: (1) disorder associated with each aperture having its own random critical velocity, and (2) effective interaperture coupling, mediated through the bulk superfluid. As the disorder becomes weak there is a transition from a regime where phase slips are largely independent to a regime where interactions lead to system-wide avalanches of phase slips. We explore the flow dynamics in both regimes, and make connections to the experiments.

• OSTI ID: 20951280
• Journal Information: Physical Review Letters, Vol. 98, Issue 17; Other Information: DOI: 10.1103/PhysRevLett.98.175301; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
APERTURES
CRITICAL VELOCITY
HELIUM 4
NANOSTRUCTURES
RANDOMNESS
SUPERFLUIDITY