Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum longitudinal and Hall transport at the LaAlO3/SrTiO3 interface
  at low electron densities   We examined the magneto-transport behavior of electrons confined at the
conducting LaAlO3/SrTiO3 interface in the low sheet carrier density regime. We
observed well resolved Shubnikov-de Haas quantum oscillations in the
longitudinal resistance, and a plateau-like structure in the Hall conductivity.
The Landau indices of the plateaus in the Hall conductivity data show spacing
close to 4, in units of the quantum of conductance. These experimental features
can be explained by a magnetic breakdown transition, which quantitatively
explains the area, structure, and degeneracy of the measured Fermi surface.

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The categories of this paper are: astro-ph
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The categories of this paper are: physics
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The categories of this paper are: hep-ex
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The categories of this paper are: gr-qc
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The categories of this paper are: nlin
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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
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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: chem-ph
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The categories of this paper are: q-alg
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The categories of this paper are: cs
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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: math-ph
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The categories of this paper are: ao-sci