Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Deduction of Pure Spin Current from Spin Linear and Circular
  Photogalvanic Effect in Semiconductor Quantum Wells   We study the spin photogalvanic effect in two-dimensional electron system
with structure inversion asymmetry by means of the solution of semiconductor
optical Bloch equations. It is shown that a linearly polarized light may inject
a pure spin current in spin-splitting conduction bands due to Rashba spin-orbit
coupling, while a circularly polarized light may inject spin-dependent
photocurrent. We establish an explicit relation between the photocurrent by
oblique incidence of a circularly polarized light and the pure spin current by
normal incidence of a linearly polarized light such that we can deduce the
amplitude of spin current from the measured spin photocurrent experimentally.
This method may provide a source of spin current to study spin transport in
semiconductors quantitatively.

11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex