Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evidence for superconductivity in Li-decorated monolayer graphene   Monolayer graphene exhibits many spectacular electronic properties, with
superconductivity being arguably the most notable exception. It was
theoretically proposed that superconductivity might be induced by enhancing the
electron-phonon coupling through the decoration of graphene with an alkali
adatom superlattice [Profeta et al. Nat. Phys. 8, 131-134 (2012)]. While
experiments have indeed demonstrated an adatom-induced enhancement of the
electron-phonon coupling, superconductivity has never been observed. Using
angle-resolved photoemission spectroscopy (ARPES) we show that lithium
deposited on graphene at low temperature strongly modifies the phonon density
of states, leading to an enhancement of the electron-phonon coupling of up to
$\lambda\!\simeq\!0.58$. On part of the graphene-derived $\pi^*$-band Fermi
surface, we then observe the opening of a $\Delta\!\simeq\!0.9$ meV
temperature-dependent pairing gap. This result suggests for the first time, to
our knowledge, that Li-decorated monolayer graphene is indeed superconducting
with $T_c\!\simeq\!5.9 K$.

33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
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The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
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The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con