Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two-Dimensional Anharmonic Crystal Lattices: Solitons, Solectrons, and
  Electric Conduction   Reported here are salient features of soliton-mediated electron transport in
anharmonic crystal lattices.After recalling how an electron-soliton bound state
(solectron) can be formed we comment on consequences like electron surfing on a
sound wave and balistic transport, possible percolation in 2d lattices, and a
novel form of electron pairing with strongly correlated electrons both in real
space and momentum space.

7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th