Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Contact-Induced Semiconductor-to-Metal Transition in Single-Layer WS$_2$   Low-resistance ohmic contacts are a challenge for electronic devices based on
two-dimensional materials. We show that an atomically precise junction between
a two-dimensional semiconductor and a metallic contact can lead to a
semiconductor-to-metal transition in the two-dimensional material--a finding
which points the way to a possible method of achieving low-resistance
junctions. Specifically, single-layer WS$_2$ undergoes a semiconductor-to-metal
transition when epitaxially grown on Ag(111), while it remains a direct band
gap semiconductor on Au(111). The metallicity of the single layer on Ag(111) is
established by lineshape analysis of core level photoemission spectra.
Angle-resolved photoemission spectroscopy locates the metallic states near the
Q point of the WS$_2$ Brillouin zone. Density functional theory calculations
show that the metallic states arise from hybridization between Ag bulk bands
and the local conduction band minimum of WS$_2$ near the Q point.

19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
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The categories of this paper are: funct-an