Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phase transition and anomalous scaling in the quantum Hall transport of
  topological insulator Sn-Bi1.1Sb0.9Te2S devices   The scaling physics of quantum Hall transport in optimized topological
insulators with a plateau precision of ~1/1000 e2/h is considered. Two
exponential scaling regimes are observed in temperature-dependent transport
dissipation, one of which accords with thermal activation behavior with a gap
of 2.8 meV (> 20 K), the other being attributed to variable range hopping (1-20
K). Magnetic field-driven plateau-to-plateau transition gives scaling relations
of (dR$_{xy}$/dB)$^{max}$ \propto T$^{-\kappa}$ and \DeltaB$^{-1}$ \propto
T$^{-\kappa}$ with a consistent exponent of \kappa ~ 0.2, which is half the
universal value for a conventional two-dimensional electron gas. This is
evidence of percolation assisted by quantum tunneling, and reveals the
dominance of electron-electron interaction of the topological surface states.

34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg