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Depinning of the Bragg glass in a point disordered model superconductor
Umeå University, Faculty of Science and Technology, Physics.
2007 (English)In: Physical Review Letters, Vol. 98, no 9, 097001- p.Article in journal (Refereed) Published
Abstract [en]

We have performed simulations of the three-dimensional frustrated anisotropic XY model with point disorder as a model of a type-II superconductor with quenched point pinning in a magnetic field and a weak applied current. Using resistively-shunted-junction dynamics we find a critical current $I_c$ that separates a creep region with unmeasurable low voltage from a region with a voltage $V\propto (I-I_c)$, and also identify the mechanism behind this behavior. It also turns out that data at fixed disorder strength may be collapsed by plotting $V$ versus $TI$, where $T$ is the temperature, though the reason for this behavior as yet not is fully understood.

Place, publisher, year, edition, pages
2007. Vol. 98, no 9, 097001- p.
Identifiers
URN: urn:nbn:se:umu:diva-5794DOI: doi:PhysRevLettOAI: oai:DiVA.org:umu-5794DiVA: diva2:145462
Available from: 2007-11-30 Created: 2007-11-30 Last updated: 2011-01-11Bibliographically approved

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