Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Diamond (111) Surface Reconstruction and Epitaxial Graphene
  Interface   The evolution of the diamond (111) surface as it undergoes reconstruction and
subsequent graphene formation is investigated with angle-resolved photoemission
spectroscopy, low energy electron diffraction, and complementary density
functional theory calculations. The process is examined starting at the
C(111)-(2x1) surface reconstruction that occurs following detachment of the
surface adatoms at 920 {\deg}C, and continues through to the liberation of the
reconstructed surface atoms into a free-standing monolayer of epitaxial
graphene at temperatures above 1000 {\deg}C. Our results show that the
C(111)-(2x1) surface is metallic as it has electronic states that intersect the
Fermi-level. This is in strong agreement with a symmetrically {\pi}-bonded
chain model and should contribute to resolving the controversies that exist in
the literature surrounding the electronic nature of this surface. The graphene
formed at higher temperatures exists above a newly formed C(111)-(2\times1)
surface and appears to have little substrate interaction as the Dirac-point is
observed at the Fermi-level. Finally, we demonstrate that it is possible to
hydrogen terminate the underlying diamond surface by means of plasma processing
without removing the graphene layer, forming a graphene-semiconductor
interface. This could have particular relevance for doping the graphene formed
on the diamond (111)surface via tuneable substrate interactions as a result of
changing the terminating species at the diamond-graphene interface by plasma
processing.

5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin