Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Field-Induced Insulator to Semimetal Transition and Field Electron
  Emission of Nanorods of Semiconductors of Wide Energy Band Gaps   Significant field emission is found theoretically possible from nanorods of
semiconductors of wide energy band gaps. If the nanorod has a thin surface
layer containing a large number of localized states, a part of nanorod can
exhibit an insulator-to-semimetal transition under high enough fields of
direction parallel to its axis, so that field emission occurs at the apex of
the metal like tip. The field emission property of silicon carbide nanorods is
studied as an example and found to be in qualitative agreement with the
experimental findings.

8
The categories of this paper are: hep-ex
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The categories of this paper are: bayes-an
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
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The categories of this paper are: q-fin