Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Topological surface state in the Kondo Insulator Samarium Hexaboride   Strongly correlated electron systems show many exotic properties such as
unconventional superconductity, quantum criticality, and Kondo insulating
behavior. In addition, the Kondo insulator SmB6 has been predicted
theoretically to be a 3D topological insulator with a metallic surface state.
We report here transport measurements on doped SmB6, which show that ~3%
magnetic and non-magnetic dopants in SmB6 exhibit clearly contrasting behavior,
evidence that the metallic surface state is only destroyed when time reversal
symmetry is broken. We find as well a quantum percolation limit of impurity
concentration which transform the topological insulator into a conventional
band insulator by forming impurity band. Our careful thickness dependence
results show that SmB6 is the first demonstatrated perfect 3D topological
insulator with virtually zero residual bulk conductivity.

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The categories of this paper are: comp-gas
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The categories of this paper are: econ
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The categories of this paper are: math-ph
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The categories of this paper are: q-alg
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The categories of this paper are: alg-geom
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The categories of this paper are: chao-dyn
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The categories of this paper are: bayes-an
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The categories of this paper are: gr-qc
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The categories of this paper are: funct-an
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The categories of this paper are: math
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The categories of this paper are: plasm-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-th
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The categories of this paper are: hep-ex
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The categories of this paper are: mtrl-th
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The categories of this paper are: adap-org