Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phase Transition to Insulating State from Quantum Hall State by
  Current-Induced Nuclear Spin Polarization   We investigate the resistance enhancement state (RES) where the
magnetoresistance of the $\nu = 2/3$ fractional quantum Hall state (FQHS) is
increased with dynamic nuclear spin polarization (DNP) induced by a large
electric current. After inducing DNP, we measure the temperature dependence of
the magnetoresistance by a small current over a short period of time. We find
that the FQHS makes a phase transition to an insulating state. By measuring the
Hall resistance in the insulating state, we find that the RES exhibits a
quantized Hall resistance. We discuss the RES in association with the Anderson
localization.

12
The categories of this paper are: nucl-th
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The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio