Electronic structure of a mesoscopic superconducting disk: Quasiparticle tunneling between the giant vortex core and the disk edge

The electronic structure of the giant vortex states in a mesoscopic superconducting disk is studied in a dirty limit using the Usadel approach. The local density of states profiles are shown to be strongly affected by the effect of quasiparticle (QP) tunneling between the states localized in the vor...

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Bibliographic Details
Published in:Physical review. B 2019-04, Vol.99 (13), p.134512, Article 134512
Main Authors: Samokhvalov, A. V., Shereshevskii, I. A., Vdovicheva, N. K., Taupin, M., Khaymovich, I. M., Pekola, J. P., Mel'nikov, A. S.
Format: Article
Language:English
Subjects:
Crossovers
Dependence
Electronic structure
Quantum theory
Resistance
Superconducting devices
Superconductivity
Vortices
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Summary:The electronic structure of the giant vortex states in a mesoscopic superconducting disk is studied in a dirty limit using the Usadel approach. The local density of states profiles are shown to be strongly affected by the effect of quasiparticle (QP) tunneling between the states localized in the vortex core and the ones bound to the sample edge. Decreasing temperature leads to a crossover between the edge-dominated and core-dominated regimes in the magnetic field dependence of the tunneling conductance. This crossover is discussed in the context of the efficiency of quasiparticle cooling by the magnetic-field-induced QP traps in various mesoscopic superconducting devices.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.99.134512