Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Theory of spin-Hall transport of heavy holes in semiconductor quantum
  wells   Based on a proper definition of the spin current, we investigate the
spin-Hall effect of heavy holes in narrow quantum wells in the presence of
Rashba spin-orbit coupling by using a spin-density matrix approach. In contrast
to previous results obtained on the basis of the conventional definition of the
spin current, we arrive at the conclusion that an electric-field-induced
steady-state spin-Hall current does not exist in both, pure and disordered
infinite samples. Only an ac field can induce a spin-Hall effect in such
systems.

7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics