Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Large-area and high-quality 2D transition metal telluride   Atomically thin transitional metal ditellurides like WTe2 and MoTe2 have
triggered tremendous research interests because of their intrinsic nontrivial
band structure. They are also predicted to be 2D topological insulators and
type-II Weyl semimetals. However, most of the studies on ditelluride atomic
layers so far rely on the low-yield and time-consuming mechanical exfoliation
method. Direct synthesis of large-scale monolayer ditellurides has not yet been
achieved. Here, using the chemical vapor deposition (CVD) method, we
demonstrate controlled synthesis of high-quality and atom-thin tellurides with
lateral size over 300 {\mu}m. We found that the as-grown WTe2 maintains two
different stacking sequences in the bilayer, where the atomic structure of the
stacking boundary is revealed by scanning transmission electron microscope
(STEM). The low-temperature transport measurements revealed a novel
semimetal-to-insulator transition in WTe2 layers and an enhanced
superconductivity in few-layer MoTe2. This work paves the way to the synthesis
of atom-thin tellurides and also quantum spin Hall devices.

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The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
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The categories of this paper are: solv-int
19
The categories of this paper are: eess