Nonuniversal Correlations and Crossover Effects in the Bragg-Glass Phase of Impure Superconductors

Details Nonuniversal Correlations and Crossover Effects in the Bragg-Glass Phase of Impure Superconductors Nonuniversal Correlations and Crossover Effects in the Bragg-Glass Phase of Impure Superconductors

2000-11-29

arxiv.org/abs/cond-mat/0011495v1

Phys.Rev.B 63,174501(2001)

Physics

Condensed Matter

Superconductivity

17 pages, 10 figures

Scientific paper

10.1103/PhysRevB.63.174501

The structural correlation functions of a weakly disordered Abrikosov lattice are calculated in a functional RG-expansion in $d=4-\epsilon$ dimensions. It is shown, that in the asymptotic limit the Abrikosov lattice exhibits still quasi-long-range translational order described by a {\it nonuniversal} exponent $\eta_{\bf G}$ which depends on the ratio of the renormalized elastic constants $\kappa ={c}_{66}/ {c}_{11}$ of the flux line (FL) lattice. Our calculations clearly demonstrate three distinct scaling regimes corresponding to the Larkin, the random manifold and the asymptotic Bragg-glass regime. On a wide range of {\it intermediate} length scales the FL displacement correlation function increases as a power law with twice the manifold roughness exponent $\zeta_{\rm RM}(\kappa) $, which is also {\it nonuniversal}. Correlation functions in the asymptotic regime are calculated in their full anisotropic dependencies and various order parameters are examined. Our results, in particular the $\kappa$-dependency of the exponents, are in variance with those of the variational treatment with replica symmetry breaking which allows in principle an experimental discrimination between the two approaches.

Affiliated with

Also associated with

No associations

Rating

Nonuniversal Correlations and Crossover Effects in the Bragg-Glass Phase of Impure Superconductors does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Nonuniversal Correlations and Crossover Effects in the Bragg-Glass Phase of Impure Superconductors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nonuniversal Correlations and Crossover Effects in the Bragg-Glass Phase of Impure Superconductors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-398052