Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Driving Perpendicular Heat Flow: Ambipolar Transverse Thermoelectrics
  for Microscale and Cryogenic Peltier Cooling   Whereas thermoelectric performance is normally limited by the figure of merit
ZT, transverse thermoelectrics can achieve arbitrarily large temperature
differences in a single leg even with inferior ZT by being geometrically
tapered. We introduce a band-engineered transverse thermoelectric with p-type
Seebeck in one direction and n-type orthogonal, resulting in off-diagonal terms
that drive heat flow transverse to electrical current. Such materials are
advantageous for microscale devices and cryogenic temperatures -- exactly the
regimes where standard longitudinal thermoelectrics fail. InAs/GaSb type II
superlattices are shown to have the appropriate band structure for use as a
transverse thermoelectric.

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The categories of this paper are: hep-th
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The categories of this paper are: q-alg
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-lat
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The categories of this paper are: ao-sci
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The categories of this paper are: cmp-lg
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The categories of this paper are: alg-geom
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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-th
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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: atom-ph
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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: nlin
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The categories of this paper are: solv-int