Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anisotropic current-induced spin accumulation in the two-dimensional
  electron gas with spin-orbit coupling   We investigate the magnetoelectric (or inverse spin-galvanic) effect in the
two dimensional electron gases with both Rashba and Dresselhaus spin-orbit
coupling using an exact solution of the Boltzmann equation for electron spin
and momentum. The spin response to an in-plane electric field turns out to be
highly anisotropic while the usual charge conductivity remains isotropic,
contrary to earlier statements.

8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an