Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetoresistance of Si(001) MOSFETs with high concentration of
  electrons   We present an experimental study of electron transport in inversion layers of
high-mobility Si(001) samples with occupied excited subbands. The second series
of oscillations, observed in addition to the main series of Shubnikov-de Hass
oscillations, is tentatively attributed to the occupation of a subband
associated with the $E_{0'}$ level. Besides, a strong negative
magnetoresistance and nonlinear field dependence of the Hall resistance
accompany the novel oscillations at high carrier concentrations. The heating of
the 2D electron layers leads to suppression of the observed anomalies.

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The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs