Finite-size effect on the resistive state in a mesoscopic type-II superconducting stripe

G. R. Berdiyorov; A. K. Elmurodov; F. M. Peeters; D. Y. Vodolazov

doi:10.1103/PhysRevB.79.174506

← Back to search

Finite-size effect on the resistive state in a mesoscopic type-II superconducting stripe

G. R. Berdiyorov, A. K. Elmurodov, F. M. Peeters, D. Y. Vodolazov

DOI 10.1103/PhysRevB.79.174506 · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

Within the time-dependent Ginzburg-Landau (TDGL) theory we studied the creation of phase-slip lines and the interplay with a vortex lattice in a finite-length superconducting thin stripe with finite-size normal metal leads. In zero magnetic field and with increasing transport current phase-slip lines appear across the sample leading to distinct jumps in the current-voltage characteristics. When a magnetic field is applied, the moving vortex lattice becomes rearranged by the external current and fast and slow moving vortex channels are formed. Curved vortex channels are observed near the normal contacts. We found the remarkable result that at small applied magnetic field the normal-state transition current is increased as compared to the one at zero magnetic field. This effect is more pronounced for larger values of the γ parameter in the TDGL formalism. This unusual “field-induced” increase in the critical current is a consequence of the nonuniform distribution of the current in the sample.