Flux flow resistivity in the two-gap superconductivity
Jun Goryo, Hiroshi Matsukawa
TL;DR
This paper studies the flux flow resistivity in two-gap superconductors, specifically MgB2, using the Bardeen-Stephen relation, revealing agreement with experimental observations and discussing vortex properties.
Contribution
It introduces a theoretical analysis of flux flow resistivity in two-gap superconductors, aligning with recent experimental findings in MgB2.
Findings
Flux flow resistivity matches experimental anomalous field dependence.
Theoretical framework based on Bardeen-Stephen relation.
Discussion of vortex properties in two-gap systems.
Abstract
We investigate the flux flow state in a two-gap superconductor in which two s-wave gaps with different amplitudes exist on two separate Fermi surfaces. The flux flow resistivity is obtained on the basis of the Bardeen-Stephen relation and the result agrees well with the anomalous field dependence of the flow resistivity recently observed in the two-gap superconductor MgB2. Some typical properties of the vortex in this system are also discussed.
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