Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin extraction theory and its relevance to spintronics   Extraction of electrons from a semiconductor to a ferromagnet as well as the
case of injection in the reverse direction may be formulated as a scattering
theory. However, the presence of bound states at the interface arising out of
doping on the semiconductor side must be taken into account in the scattering
theory. Inclusion of the interface states yields an explanation of a recent
result of spin imaging measurement which contradicts the current understanding
of spin extraction. The importance of an extraction theory to spintronics is
illustrated by an application to a spin switch.

5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol