Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comment on "Charged impurity scattering limited low temperature
  resistivity of low density silicon inversion layers" (Das Sarma and Hwang,
  cond-mat/9812216)   In a recent preprint cond-mat/9812216, Das Sarma and Hwang propose an
explanation of the sharp decrease in resistivity at low temperatures which has
been attributed to a transition to an unexpected conducting phase in dilute
high-mobility two-dimensional systems at B=0. In this Comment, we examine
whether their model is supported by the available experimental data.

36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
19
The categories of this paper are: eess
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
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The categories of this paper are: comp-gas
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th