On the field dependence of the vortex core size

Details On the field dependence of the vortex core size On the field dependence of the vortex core size

2004-07-26

arxiv.org/abs/cond-mat/0407673v1

Physics

Condensed Matter

Superconductivity

8 pages, 2 figures

Scientific paper

10.1103/PhysRevB.71.134505

We argue that in clean high-$\kappa$ type II superconductors, the low temperature vortex core size (defined as the coherence length $\xi$) in high fields should decrease with increasing applied field in qualitative agreement with experimental data. Calculations are done for the Fermi sphere and cylinder (with the field parallel to the cylinder axis). The results for clean materials at T=0 can be represented as $\xi(H)/\xi(H_{c2}) = U (H/H_{c2})$ with $U$ being an universal function.

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