Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Progressive suppression of spin relaxation in 2D channels of finite
  width   We have investigated spatio-temporal kinetics of electron spin polarization
in semiconductor narrow 2D strip and explored the ability to manipulate spin
relaxation. Information about spin of the conduction electrons and mechanisms
of spin rotation is incorporated into transport Monte Carlo simulation program.
A model problem, involving linear-in-k splitting of the conduction band,
responsible for the D'yakonov-Perel' mechanism of spin relaxation in the
zinc-blende semiconductors and heterostructures, is solved numerically to yield
the decay of spin polarization of an ensemble of electrons in the 2D channel of
finite width. For very wide channels, a conventional 2D value of spin
relaxation is obtained. With decreasing channel width the relaxation time
soares rapidly by orders of magnitude. Surprisingly, the cross-over point
between 2D and quasi-1D behavior is found to be at tens of electron mean-free
paths. Thus, classically wide channels can effectively suppress electron spin
relaxation.

31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an