Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anomalous transport near the Lifshitz transition at the
  LaAlO$_3$/SrTiO$_3$ interface   The two-dimensional electron liquid, at the (001) interface between band
insulators {L}a{A}l{O}$_3$ and {S}r{T}i{O}$_3$, undergoes Lifshitz transition
as the interface is doped with carriers. At a critical carrier density, two new
orbitals populate at the Fermi level, with a concomitant change in the Fermi
surface topology. Using dynamical mean-field theory, formulated within a
realistic three-orbital model, we study the influence of the Lifshitz
transition and local electron correlations on the transport properties. We look
at the thermal conductivity, optical conductivity, Seebeck coefficient and
angle resolved photoemission spectra and find that at a critical density, both
the thermal and dc conductivities rise sharply to higher values while the
Seebeck coefficient shows a cusp. The inter-orbital electron-electron
interaction transfers spectral weight near the $\Gamma$ point towards lower
energy, thereby reducing the critical density. In the presence of external
magnetic field, the critical density further reduces due to exchange splitting.
Beyond a sufficiently large field, multiple cusps appear in the Seebeck
coefficient revealing multiple Lifshitz transitions.

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The categories of this paper are: nucl-th
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The categories of this paper are: econ
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-bio
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The categories of this paper are: math
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-th
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The categories of this paper are: atom-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: physics
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The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
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The categories of this paper are: stat
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The categories of this paper are: acc-phys
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The categories of this paper are: bayes-an
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The categories of this paper are: patt-sol