Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charge and spin diffusion on the metallic side of the metal-insulator
  transition: a self-consistent approach   We develop a self-consistent theory describing the spin and spatial electron
diffusion in the impurity band of doped semiconductors under the effect of a
weak spin-orbit coupling. The resulting low-temperature spin-relaxation time
and diffusion coefficient are calculated within different schemes of the
self-consistent framework. The simplest of these schemes qualitatively
reproduces previous phenomenological developments, while more elaborate
calculations provide corrections that approach the values obtained in numerical
simulations. The results are universal for zinc-blende semiconductors with
electron conductance in the impurity band, and thus they are able to account
for the measured spin-relaxation times of materials with very different
physical parameters. From a general point of view, our theory opens a new
perspective for describing the hopping dynamics in random quantum networks.

29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg