Planar defects and the fate of the Bragg glass phase of type-II superconductors

Details Planar defects and the fate of the Bragg glass phase of type-II superconductors Planar defects and the fate of the Bragg glass phase of type-II superconductors

2006-04-13

arxiv.org/abs/cond-mat/0604345v1

Phys. Rev. Lett. 97, 177002 (2006)

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, 1 figure

Scientific paper

10.1103/PhysRevLett.97.177002

It is shown that the Bragg glass phase can become unstable with respect to planar defects. A single defect plane that is oriented parallel to the magnetic field as well as to one of the main axis of the Abrikosov flux line lattice is always relevant, whereas we argue that a plane with higher Miller index is irrelevant, even at large defect potentials. A finite density of parallel defects with random separations can be relevant even for larger Miller indices. Defects that are aligned with the applied field restore locally the flux density oscillations which decay algebraically with distance from the defect. The current voltage relation is changed to ln V(J) -J^{-1}. The theory exhibits some similarities to the physics of Luttinger liquids with impurities.

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