Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Hot Electron Thermocouple and the Diffusion Thermopower of
  Two-Dimensional Electrons in GaAs   A simple hot electron thermocouple is realized in a two-dimensional electron
system (2DES) and used to measure the diffusion thermopower of the 2DES at zero
magnetic field. This hot electron technique, which requires no micron-scale
patterning of the 2DES, is much less sensitive than conventional methods to
phonon-drag effects. Our thermopower results are in good agreement with the
Mott formula for diffusion thermopower for temperatures up to T ~ 2 K.

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The categories of this paper are: math-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: supr-con
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The categories of this paper are: gr-qc
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The categories of this paper are: q-alg
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The categories of this paper are: patt-sol
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The categories of this paper are: solv-int
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The categories of this paper are: adap-org
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The categories of this paper are: cmp-lg
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The categories of this paper are: dg-ga
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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: nucl-ex
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The categories of this paper are: funct-an