Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect of density on quantum Hall stripe orientation in tilted magnetic
  fields   We investigate quantum Hall stripes under in-plane magnetic field
$B_\parallel$ in a variable-density two-dimensional electron gas. At filling
factor $\nu = 9/2$, we observe one, two, and zero $B_\parallel$-induced
reorientations at low, intermediate, and high densities, respectively. The
appearance of these distinct regimes is due to a strong density dependence of
the $B_\parallel$-induced orienting mechanism which triggers the second
reorientation, rendering stripes \emph{parallel} to $B_\parallel$. In contrast,
the mechanism which reorients stripes perpendicular to $B_\parallel$ showed no
noticeable dependence on density. Measurements at $\nu = 9/2$ and $11/2$ at the
same, tilted magnetic field, allows us to rule out density dependence of the
native symmetry-breaking field as a dominant factor. Our findings further
suggest that screening might play an important role in determining stripe
orientation, providing guidance in developing theories aimed at identifying and
describing native and $B_\parallel$-induced symmetry-breaking fields.

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The categories of this paper are: astro-ph
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The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
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The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
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The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
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The categories of this paper are: acc-phys
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The categories of this paper are: econ
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The categories of this paper are: math
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The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an