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Vortex state in a two-gap superconductor

โœ Scribed by Jun Goryo; Shingo Soma; Hiroshi Matsukawa

Publisher
Elsevier Science
Year
2006
Tongue
English
Weight
181 KB
Volume
437-438
Category
Article
ISSN
0921-4534

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โœฆ Synopsis

We discuss a flux flow resistivity in the system with two s-wave superconducting gaps. Our result agrees well with anomalous field dependence of the resistivity recently observed in the vortex state of MgB 2 . We comment on the possibility of the presence of vortex with irrational flux, which is represented as the unit flux times an irrational number.

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Vortex core shrinkage in a two gap super
Vortex core shrinkage in a two gap superconductor: Application to MgB2
โœ S. Graser; A. Gumann; T. Dahm; N. Schopohl ๐Ÿ“‚ Article ๐Ÿ“… 2007 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 131 KB

As a model for the vortex core in MgB 2 we study a two band model with a clean r band and a dirty p band. We present calculations of the vortex core size in both bands as a function of temperature and show that there exists a Kramer-Pesch effect in both bands even though only one of the bands is in