Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spectroscopic evidence of high temperature superconductivity in VSe2   High-resolution angle-resolved photoemission experiments reveal subtle
modifications of the surface electronic structure of VSe2. Most remarkably, we
show that superconductivity can be induced in VSe2 by the right selection of
substrate and growth parameters. Evidence for the superconducting state comes
from the simultaneous detection of spectral kink, quasiparticle peak, Fermi
gap, and their evolution with the temperature. The observation of
Bogoliubov-like back-bending bands at low temperatures, signaling electron-hole
pairing, further supports the presence of superconductivity in this system. The
photoemission experiment also provides evidence for a formation of a pseudogap
state at high temperatures, characterized by the progressive quenching of the
quasiparticle peak feature coexisting with a persistent gap at the Fermi level,
a behavior reminiscent of high-Tc superconductors. We attributed the origin of
superconductivity in these VSe2 films to a modified Fermi surface combined with
the formation of van Hove singularity points with a binding energy
corresponding to the chemical potential of the system. Although Tc cannot be
accurately determined from photoemission data, observations based on the
survival temperature of the quasiparticle peak suggest that Tc could be as high
as 100 ? 5 K and substantially higher than previous reports for any transition
metal dichalcogenides.

25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph