Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ambipolar charge transport in quasi-free-standing monolayer graphene on
  SiC obtained by gold intercalation   We present a study of quasi-free-standing monolayer graphene obtained by
intercalation of Au atoms at the interface between the carbon buffer layer
(Bu-L) and the silicon-terminated face (0001) of 4H-silicon carbide. Au
intercalation is achieved by deposition of atomically thin Au on the Bu-L
followed by annealing at 850 {\deg}C in an Argon atmosphere. We explore the
intercalation of Au and decoupling of the Bu-L into quasi-free-standing
monolayer graphene by surface science characterizations and electron transport
in top-gated electronic devices. By gate-dependent magnetotransport we find
that the Au-intercalated buffer layer displays all properties of monolayer
graphene, namely gate tunable ambipolar transport across the Dirac point, and
n- or p-type doping depending on the Au content.

2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph