Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fingerprints of Dirac points in first-principles scanning tunneling
  spectra of graphene on a metal substrate   Graphene physisorbed on a metal has its characteristic Dirac cones preserved
in the band-structure, but the Fermi level of the system is shifted due to the
interaction with the substrate. Based on density functional calculations with
van der Waals corrections, we present a method to determine the position of the
Dirac point with respect to the Fermi level from the measured scanning
tunneling spectra (STS). It has been demonstrated that the dips in both
simulated local density of states and in the observed dI/dV profiles are indeed
the fingerprints of the Dirac points. The type and the level of doping can be
then inferred directly from the STS data without any additional experimental
technique. Test calculations of graphene on a Cu(111) substrate have shown that
the predicted position of the Dirac point is in close proximity to the
experimental value reported in the recent studies. Moreover, simulations for
graphene on a Pt(111) surface allow us to explain the apparent contradictions
in the state-of-the-art experimental works.

29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg