Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optimizing electronic structure and quantum transport at the
  graphene-Si(111) interface: An ab-initio density-functional study   We use ab initio density functional calculations to determine the interaction
of a graphene monolayer with the Si(111) surface. We found that graphene forms
strong bonds to the bare substrate and accommodates the 12% lattice mismatch by
forming a wavy structure consisting of free-standing conductive ridges that are
connected by ribbon-shaped regions of graphene, which bond covalently to the
substrate. We perform quantum transport calculations for different geometries
to study changes in the transport properties of graphene introduced by the wavy
structure and bonding to the Si substrate. Our results suggest that wavy
graphene combines high mobility along the ridges with efficient carrier
injection into Si in the contact regions.

2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex