Non-linear sigma model study of magnetic dephasing in a mesoscopic spin glass

Details Non-linear sigma model study of magnetic dephasing in a mesoscopic spin glass Non-linear sigma model study of magnetic dephasing in a mesoscopic spin glass

2009-04-07

arxiv.org/abs/0904.1011v2

EPL, 88, 57009 (2009)

Physics

Condensed Matter

Disordered Systems and Neural Networks

6 pages, 2 figures

Scientific paper

We propose a nonlinear sigma model for the description of quantum transport in a mesoscopic metallic conductor with magnetic impurities frozen in a spin glass phase. It accounts for the presence of both the corresponding scalar and magnetic random potentials. In a spin glass, this magnetic random potential is correlated between different realizations. As the strength of the magnetic potential is varied, this model describes the crossover between orthogonal and unitary universality classes of the nonlinear sigma model. We apply this technique to the calculations of the correlation of conductance between two frozen spin configurations in terms of dephasing rates for the usual low energy modes of weak localization theory.

Affiliated with

Also associated with

No associations

Rating

Non-linear sigma model study of magnetic dephasing in a mesoscopic spin glass 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 Non-linear sigma model study of magnetic dephasing in a mesoscopic spin glass, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-linear sigma model study of magnetic dephasing in a mesoscopic spin glass will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-313051