Order and Creep in Flux Lattices and CDWs Pinned by Planar Defects

TL;DR

This paper presents a theoretical study of how planar defects and point impurities affect the order and transport properties of flux lattices and charge density waves in type-II superconductors, revealing a new glassy phase and specific creep behavior.

Contribution

It introduces a new glassy phase dominated by planar defects with unique properties and characterizes flux creep resistivity behavior under strong disorder conditions.

Findings

Flux lattice exhibits a glassy phase with finite compressibility and exponential decay of long-range order.

Flux creep resistivity follows an exponential form $ ho(J) o ext{exp}-(J_0/J)^{3/2}$ for currents parallel to defects.

Strong disorder induces dislocations that relax shear strain.

Abstract

The influence of randomly distributed point impurities \emph{and} planar defects on the order and transport in type-II superconductors and related systems is considered theoretically. For planar defects of identical orientation the flux line lattice exhibits a new glassy phase dominated by the planar defects with a finite compressibility, a transverse Meissner effect, large sample to sample fuctuations of the susceptibility and an exponential decay of translational long range order. The flux creep resistivity for currents $J$ parallel to the defects is $\rho(J)\sim \exp-(J_0/J)^{3/2}$ . Strong disorder enforces an array of dislocations to relax shear strain.