Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Observation of monolayer valence band spin-orbit effect and induced
  quantum well states (QWS) in MoX2   Transition metal dichalcogenides have attracted much attention recently due
to their potential applications in spintronics and photonics as a result of the
indirect to direct band gap transition and the emergence of the spin-valley
coupling phenomenon upon moving from the bulk to monolayer limit. Here, we
report high-resolution angle-resolved photoemission spectroscopy on MoSe2
(molybdenum diselenide) single crystals and monolayer films of MoS2 grown on
Highly Ordered Pyrolytic Graphite substrate. Our experimental results, for the
first time, resolve the two distinct bands at the Brillouin zone corner of the
bulk MoSe2, and provide evidence for the critically important spin-orbit split
bands of the monolayer MoS2. Moreover, by depositing potassium on cleaved
surfaces of these materials, the process through which quantum well states form
on the surfaces of transition metal dichalcogenides is systematically imaged.
We present a theoretical model to account for the observed spin-orbit splitting
and the rich spectrum of the quantum well states observed in our experiments.
Our findings taken together provide important insights into future applications
of transition metal dichalcogenides in nanoelectronics, spintronics, and
photonics devices as they critically depend on the spin-orbit physics of these
materials.

11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int