Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantized coexisting electrons and holes in graphene measured using
  temperature dependent magneto-transport   We present temperature-dependent magneto-transport experiments around the
charge neutrality point in graphene and determine the amplitude of potential
fluctuations $s$ responsible for the formation of electron-hole puddles. The
experimental value $s \approx 20$ meV is considerably larger than in
conventional semiconductors which implies a strong localization of charge
carriers observable up to room temperature. Surprisingly, in the quantized
regime, the Hall resistivity overshoots the highest plateau values at high
temperatures. We demonstrate by model calculations that such a peculiar
behavior is expected in any system with coexisting electrons and holes when the
energy spectrum is quantized and the carriers are partially localized.

20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an