Document Type

Article

Date

7-18-1994

Embargo Period

10-21-2011

Keywords

condensed matter

Language

English

Disciplines

Physics

Description/Abstract

We discuss the low-temperature dynamics of magnetic flux lines in high-temperature superconductors in the presence of a family of parallel twin planes that contain the $c$ axis. A current applied along the twin planes drives flux motion in the direction transverse to the planes and acts like an electric field applied to {\it one-dimensional} carriers in disordered semiconductors. As in flux arrays with columnar pins, there is a regime where the dynamics is dominated by superkink excitations that correspond to Mott variable range hopping (VRH) of carriers. In one dimension, however, rare events, such as large regions void of twin planes, can impede VRH and dominate transport in samples that are sufficiently long in the direction of flux motion. In short samples rare regions can be responsible for mesoscospic effects. The phase boundaries separating various transport regimes are discussed. The effect of tilting the applied field out of the twin planes is also considered. In this case the resistivity from flux motion is found to depend strongly on the tilt angle.

Additional Information

This manuscript is from arXiv.org, for more information see http://arxiv.org/abs/cond-mat/9407078

Source

harvested from arXiv.org

Included in

Physics Commons

Share

COinS