Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bernstein modes and giant microwave response of two-dimensional electron
  system   We report on a new contribution to the microwave response of a
two-dimensional electron system in magnetic field which originates from
excitation of virtual Bernstein modes. These collective modes emerge as a
result of interaction between usual magnetoplasmon mode and cyclotron resonance
harmonics. The electrons are found to experience a strongly enhanced radiation
field when its frequency falls in a gap of the Bernstein modes spectrum. This
field can give rise to nonlinear effects, one of which, the parametric
cyclotron resonance, is discussed. We argue that this resonance leads to a
plasma instability in the ultraclean system. The instability-induced heating is
responsible for the giant photoresistivity spike recently observed in the
vicinity of the 2nd cyclotron resonance harmonic.

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The categories of this paper are: mtrl-th
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The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
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The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th