Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin-Hall edge spin polarization in a ballistic 2D electron system   Universal properties of spin-Hall effect in ballistic 2D electron systems are
addressed. The net spin polarization across the edge of the conductor is second
order, ~\lambda^2, in spin-orbit coupling constant independent of the form of
the boundary potential, with the contributions of normal and evanescent modes
each being ~ \sqrt{\lambda} but of opposite signs. This general result is
confirmed by the analytical solution for a hard-wall boundary, which also
yields the detailed distribution of the local spin polarization. The latter
shows fast (Friedel) oscillations with the spin-orbit coupling entering via the
period of slow beatings only. Long-wavelength contributions of evanescent and
normal modes exactly cancel each other in the spectral distribution of the
local spin density.

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The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
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The categories of this paper are: q-bio
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The categories of this paper are: q-alg
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
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The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
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The categories of this paper are: atom-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: comp-gas
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The categories of this paper are: physics
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The categories of this paper are: econ
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The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom