Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Variational study of the nu=1 quantum Hall ferromagnet in the presence
  of spin-orbit interaction   We investigate the nu=1 quantum Hall ferromagnet in the presence of
spin-orbit coupling of the Rashba or Dresselhaus type by means of
Hartree-Fock-typed variational states. In the presence of Rashba (Dresselhaus)
spin-orbit coupling the fully spin-polarized quantum Hall state is always
unstable resulting in a reduction of the spin polarization if the product of
the particle charge $q$ and the effective $g$-factor is positive (negative). In
all other cases an alternative variational state with O(2) symmetry and finite
in-plane spin components is lower in energy than the fully spin-polarized state
for large enough spin-orbit interaction. The phase diagram resulting from these
considerations differs qualitatively from earlier studies.

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The categories of this paper are: adap-org
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The categories of this paper are: supr-con
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The categories of this paper are: cmp-lg
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The categories of this paper are: atom-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: math
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The categories of this paper are: solv-int
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The categories of this paper are: funct-an
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The categories of this paper are: math-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-th
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The categories of this paper are: gr-qc
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The categories of this paper are: dg-ga
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The categories of this paper are: stat
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The categories of this paper are: quant-ph