Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anisotropic modification of the effective hole $g$-factor by
  electrostatic confinement   We investigate effects of lateral confinement on spin splitting of energy
levels in 2D hole gases grown on [311] GaAs. We found that lateral confinement
enhances anisotropy of spin splitting relative to the 2D gas for both confining
directions. Unexpectedly, the effective $g$-factor does not depend on the 1D
energy level number $N$ for $B\|[0\bar{1}1]$ while it has strong $N$-dependence
for $B\|[\bar{2}33]$. Apart from quantitative difference in the spin splitting
of energy levels for the two orthogonal confinement directions we also report
qualitative differences in the appearance of spin-split plateaus, with
non-quantized plateaus observed only for the confinement in $[0\bar{1}1]$
direction. In our samples we can clearly associate the difference with
anisotropy of spin-orbit interactions.

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The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
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The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
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The categories of this paper are: eess
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The categories of this paper are: solv-int
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The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: astro-ph
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The categories of this paper are: math-ph
1
The categories of this paper are: cs
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The categories of this paper are: math
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The categories of this paper are: hep-lat
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The categories of this paper are: physics
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The categories of this paper are: dg-ga