Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Confinement engineering of s-d exchange interactions in GaMnAs quantum
  wells   Recent measurements of coherent electron spin dynamics reveal an
antiferromagnetic s-d exchange coupling between conduction band electrons and
electrons localized on Mn{2+} impurities in GaMnAs quantum wells. Here we
discuss systematic measurements of the s-d exchange interaction in
GaMnAs/AlGaAs quantum wells with different confinement potentials using
time-resolved Kerr rotation. Extending previous investigations of the
dependence of the s-d exchange, N{0}alpha, on well width, we find that its
magnitude also depends on well depth. Both phenomena reduce to a general
dependence on confinement energy, described by a band-mixing model of
confinement-induced kinetic exchange in the conduction band.

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The categories of this paper are: nlin
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The categories of this paper are: q-alg
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The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
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The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
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The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
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The categories of this paper are: hep-th
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The categories of this paper are: supr-con
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The categories of this paper are: eess
20
The categories of this paper are: acc-phys
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The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph