Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Deep moir\'e potentials in twisted transition metal dichalcogenide
  bilayers   In twisted bilayers of semiconducting transition metal dichalcogenides
(TMDs), a combination of structural rippling and electronic coupling gives rise
to periodic moir\'e potentials that can confine charged and neutral
excitations. Here, we report experimental measurements of the structure and
spectroscopic properties of twisted bilayers of WSe2 and MoSe2 in the
H-stacking configuration using scanning tunneling microscopy (STM). Our
experiments reveal that the moir\'e potential in these bilayers at small angles
is unexpectedly large, reaching values of above 300 meV for the valence band
and 150 meV for the conduction band - an order of magnitude larger than
theoretical estimates based on interlayer coupling alone. We further
demonstrate that the moir\'e potential is a non-monotonic function of moir\'e
wavelength, reaching a maximum at around a 13nm moir\'e period. This
non-monotonicity coincides with a drastic change in the structure of the
moir\'e pattern from a continuous variation of stacking order at small moir\'e
wavelengths to a one-dimensional soliton dominated structure at large moir\'e
wavelengths. We show that the in-plane structure of the moir\'e pattern is
captured well by a continuous mechanical relaxation model, and find that the
moir\'e structure and internal strain rather than the interlayer coupling is
the dominant factor in determining the moir\'e potential. Our results
demonstrate the potential of using precision moir\'e structures to create
deeply trapped carriers or excitations for quantum electronics and
optoelectronics.

25
The categories of this paper are: patt-sol
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The categories of this paper are: mtrl-th
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The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
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The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
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The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: funct-an
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The categories of this paper are: solv-int
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The categories of this paper are: econ
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The categories of this paper are: plasm-ph
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The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
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The categories of this paper are: stat