Relation between Vortex Pinning Energy and Anderson's Theorem

Details Relation between Vortex Pinning Energy and Anderson's Theorem Relation between Vortex Pinning Energy and Anderson's Theorem

2002-10-29

arxiv.org/abs/cond-mat/0210642v1

J. Low Temp. Phys. 130 (2003) 193

Physics

Condensed Matter

Superconductivity

14 pages, 1 figure; To appear in J. Low Temp. Phys.; Invited talk at NATO ARW: Vortex Dynamics in HTSC, Tashkent (Uzbekistan),

Scientific paper

We discuss the elementary vortex pinning in type-II superconductors in connection with the Anderson's theorem for nonmagnetic impurities. We address the following two issues. One is an enhancement of the vortex pinning energy in the unconventional superconductors. This enhancement comes from the pair-breaking effect of a nonmagnetic defect as the pinning center far away from the vortex core (i.e., the pair-breaking effect due to the non-applicability of the Anderson's theorem in the unconventional superconductors). The other is an effect of the chirality on the vortex pinning energy in a chiral p-wave superconductor. The vortex pinning energy depends on the chirality. This is related to the cancellation of the angular momentum between the vorticity and chirality in a chiral p-wave vortex core, resulting in local applicability of the Anderson's theorem (or local recovery of the Anderson's theorem) inside the vortex core.

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