Marginal pinning of vortices at high temperature

Details Marginal pinning of vortices at high temperature Marginal pinning of vortices at high temperature

2001-04-12

arxiv.org/abs/cond-mat/0104232v1

Phys. Rev. B 64, 134523 (2001)

Physics

Condensed Matter

Disordered Systems and Neural Networks

5 pages, RevTeX, 1 postscript figure inserted

Scientific paper

10.1103/PhysRevB.64.134523

We analyze the competition between thermal fluctuations and pinning of vortices in bulk type II superconductors subject to point-like disorder and derive an expression for the temperature dependence of the pinning length L_c(T) which separates different types of single vortex wandering. Given a disorder potential with a basic scale \xi and a correlator K_0(u) \sim K_0 (u/xi)^{-\beta} ln^alpha (u/xi) we determine the dependence of L_c(T) on the correlator range: correlators with \beta > 2 (short-range) and \beta <2 (long-range) lead to the known results L_c(T) \sim L_c(0) exp[C T^3] and L_c(T) \sim L_c(0) (C T)^{(4+beta)/(2-beta)}, respectively. Using functional renormalization group we show that for \beta =2 the result takes the interpolating form L_c(T) \sim L_c(0) exp[C T^{3/(2+alpha)}]. Pinning of vortices in bulk type II superconductors involves a long-range correlator with \beta=2, \alpha=1 on intermediate scales \xi

Affiliated with

Also associated with

No associations

Rating

Marginal pinning of vortices at high temperature 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 Marginal pinning of vortices at high temperature, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Marginal pinning of vortices at high temperature will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-441515