Physics – Condensed Matter
Scientific paper
1993-10-01
Physics
Condensed Matter
4 pages, LaTeX3.0, REVTEX3.0 and epsf macros required, 2 uuencoded postscript figures appended
Scientific paper
10.1209/0295-5075/24/6/011
The equilibrium behavior of a system of elastic layers under tension in the presence of correlated disorder is studied using functional renormalization group techniques. The model exhibits many of the features of the Bose glass phase of type II superconductors induced by columnar defects, but may be more directly applicable to charge density waves, incommensurate striped magnetic phases, stacked membranes under tension, vicinal crystal surfaces, or superconducting ``vortex--chains''. Below five dimensions, an epsilon expansion for the stable zero temperature fixed point yields the properties of the glassy phase. Transverse to the direction of correlation, the randomness induces logarithmic growth of displacements. Displacements are strongly localized in the correlation direction. The absence of a response to a weak applied transverse field (transverse Meissner effect) is demonstrated analytically. In this simple model, the localized phase is stable to point disorder, in contrast to the behavior in the presence of dislocations, in which the converse is believed to be true.
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