Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Negative Differential Resistance and Astability of the Wigner Solid   We report an unusual breakdown of the magnetically induced Wigner solid in an
exceptional two-dimensional electron gas. The current-voltage characteristic is
found to be hysteretic in the voltage biased setup and has a region of negative
differential resistance in the current biased setup. When the sample is current
biased in the region of negative differential resistance, the voltage on and
the current through the sample develop spontaneous narrow band oscillations.

30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom