Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Robust Surface Hall Effect and Nonlocal Transport in SmB6: Indication
  for an Ideal Topological Insulator   A topological insulator (TI) is an unusual quantum state in which the
insulating bulk is topologically distinct from vacuum, resulting in a unique
metallic surface that is robust against time-reversal invariant perturbations.
These surface transport properties, however, remains difficult to be isolated
from the bulk in existing TI crystals (Bi2Se3, Bi2Te3 and Sb2Te3) due to
impurity caused bulk conduction. We report in large crystals of topological
Kondo insulator (TKI) candidate material SmB6 the thickness-independent surface
Hall effects and non- local transport, which are robust against perturbations
including mechanical abrasion. These results serve as proof that at low
temperatures SmB6 has a robust metallic surface that surrounds a truly
insulating bulk, paving the way for transport studies of the surface state in
this proposed TKI material. (xia.jing@uci.edu).

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The categories of this paper are: alg-geom
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The categories of this paper are: adap-org
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-lat
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The categories of this paper are: q-alg
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The categories of this paper are: nucl-th
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The categories of this paper are: solv-int
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The categories of this paper are: q-bio
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The categories of this paper are: hep-th
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The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
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The categories of this paper are: physics
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The categories of this paper are: cs
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The categories of this paper are: stat
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The categories of this paper are: gr-qc
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The categories of this paper are: nlin