Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comments on "Spin-dependent tunneling through a symmetric semiconductor
  barrier: The Dresselhaus effect"   In a recent paper [Phys. Rev. B 72, 153314 (2005)], the $k^{3}$-Dresselhaus
term in the contacts and the full form of the current operator are considered
for spin-dependent tunneling through a symmetric barrier. The authors found
that the full form of the current operator has a much larger influence on the
spin polarization than it was initially thought. In this Comment we will show
that their treatment of the other problem, the $k^{3}$-Dresselhaus term in the
contacts, is incorrect. Their proposed solution in the contacts simply does not
obey the Schr\"{o}dinger equation. In this context we also comment on the
definition and the suitability of spin polarization in contacts with spin-orbit
coupling.

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The categories of this paper are: cmp-lg
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The categories of this paper are: eess
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ex
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The categories of this paper are: supr-con
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The categories of this paper are: atom-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: funct-an
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-th
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The categories of this paper are: quant-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-ex
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The categories of this paper are: solv-int
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The categories of this paper are: q-fin
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The categories of this paper are: chem-ph