Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin edge helices in a perpendicular magnetic field   We present an exact solution to the problem of the spin edge states in the
presence of equal Bychkov-Rashba and Dresselhaus spin-orbit fields in a
two-dimensional electron system, restricted by a hard-wall confining potential
and exposed to a perpendicular magnetic field. We find that the spectrum of the
spin edge states depends critically on the orientation of the sample edges with
respect to the crystallographic axes. Such a strikingly different spectral
behavior generates new modes of the persistent spin helix-spin edge helices
with novel properties, which can be tuned by the applied electric and magnetic
fields.

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The categories of this paper are: alg-geom
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The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
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The categories of this paper are: eess
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The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
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The categories of this paper are: adap-org
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex