Longitudinal Current Dissipation in Bose-glass Superconductors

Details Longitudinal Current Dissipation in Bose-glass Superconductors Longitudinal Current Dissipation in Bose-glass Superconductors

1996-06-05

arxiv.org/abs/cond-mat/9606025v1

Physical Review B 54, R6845 (1996)

Physics

Condensed Matter

5 pages, revtex

Scientific paper

10.1103/PhysRevB.54.R6845

A scaling theory of vortex motion in Bose glass superconductors with currents parallel to the common direction of the magnetic field and columnar defects is presented. Above the Bose-glass transition the longitudinal DC resistivity $\rho_{||}(T)\sim (T-T_{BG})^{\nu' z'}$ vanishes much faster than the corresponding transverse resistivity $\rho_{\perp}(T)\sim (T-T_{BG})^{\nu' (z'-2)}$, thus {\it reversing} the usual anisotropy of electrical transport in the normal state of layered superconductors. In the presence of a current $\bf J$ at an angle $\theta_J$ with the common field and columnar defect axis, the electric field angle $\theta_E$ approaches $\pi/2$ as $T\rightarrow T_{BG}^+$. Scaling also predicts the behavior of penetration depths for the AC currents as $T\rightarrow T_{BG}^-$, and implies a {\it jump discontinuity} at $T_{BG}$ in the superfluid density describing transport parallel to the columns.

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