Volume 35, Number 5, August II 1996
|Page(s)||379 - 384|
|Section||Condensed matter: electronic structure, electrical, magnetic and optical properties|
|Published online||01 September 2002|
Stability of the Bragg glass phase in a layered geometry
CNRS - Laboratoire de Physique Théorique de l'Ecole Normale
Supérieure, 24 rue Lhomond, F-75231 Paris (Laboratoire Propre du CNRS,
associé à l'Ecole Normale Supérieure et à l'Université Paris-Sud.)
2 Laboratoire de Physique des Solides, Université Paris-Sud, Bât. 510, 91405 Orsay, France (Laboratoire Associé au CNRS.)
Accepted: 26 June 1996
We study the stability of the dislocation-free Bragg glass phase in a layered geometry consisting of coupled parallel planes of d=1+1 vortex lines lying within each plane, in the presence of impurity disorder. Using renormalization group, replica variational calculations and physical arguments, we find that at temperatures the 3D Bragg glass phase is always stable for weak disorder. It undergoes a weakly first-order transition into a decoupled 2D vortex glass upon increase of disorder.
PACS: 74.60.Ge – Flux pinning, flux creep, and flux-line lattice dynamics / 05.20.-y – Statistical mechanics
© EDP Sciences, 1996
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