Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonlinear resistance of 2D electrons in crossed electric and magnetic
  fields   The longitudinal resistivity of two dimensional (2D) electrons placed in
strong magnetic field is significantly reduced by applied electric field, an
effect which is studied in a broad range of magnetic fields and temperatures in
GaAs quantum wells with high electron density. The data are found to be in good
agreement with theory, considering the strong nonlinearity of the resistivity
as result of non-uniform spectral diffusion of the 2D electrons. Inelastic
processes limit the diffusion. Comparison with the theory yields the inelastic
scattering time of the two dimensional electrons. In the temperature range
T=2-10(K) for overlapping Landau levels, the inelastic scattering rate is found
to be proportional to T^2, indicating a dominant contribution of the
electron-electron scattering to the inelastic relaxation. In a strong magnetic
field, the nonlinear resistivity demonstrates scaling behavior, indicating a
specific regime of electron heating of well-separated Landau levels. In this
regime the inelastic scattering rate is found to be proportional to T^3,
suggesting the electron-phonon scattering as the dominant mechanism of the
inelastic relaxation.

12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio