Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Suppression of Coulomb exchange energy in quasi-two-dimensional hole
  systems   We have calculated the exchange-energy contribution to the total energy of
quasi-two-dimensional hole systems realized by a hard-wall quantum-well
confinement of valence-band states in typical semiconductors. The magnitude of
the exchange energy turns out to be suppressed from the value expected for
analogous conduction-band systems whenever the mixing between heavy-hole and
light-hole components is strong. Our results are obtained using a very general
formalism for calculating the exchange energy of many-particle systems where
single-particle states are spinors. We have applied this formalism to obtain
analytical results for spin-3/2 hole systems in limiting cases.

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The categories of this paper are: econ
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
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The categories of this paper are: stat
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
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The categories of this paper are: funct-an
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The categories of this paper are: alg-geom
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The categories of this paper are: dg-ga
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The categories of this paper are: mtrl-th
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The categories of this paper are: comp-gas