Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum Spin Hall Effect and Topological Field Effect Transistor in
  Two-Dimensional Transition Metal Dichalcogenides   We report a new class of large-gap quantum spin Hall insulators in
two-dimensional transition metal dichalcogenides, namely, MX$_2$ with M=(Mo, W)
and X=(S, Se, and Te), whose topological electronic properties are highly
tunable by external electric field. We propose a novel topological field effect
transistor made of these atomic layer materials and their van der Waals
heterostructures. Our device exhibits parametrically enhanced charge-spin
conductance through topologically protected transport channels, and can be
rapidly switched off by electric field through topological phase transition
instead of carrier depletion. Our work provides a practical material platform
and device architecture for topological quantum electronics.

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The categories of this paper are: bayes-an
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The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-ex
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The categories of this paper are: stat
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The categories of this paper are: mtrl-th
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The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
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The categories of this paper are: supr-con