Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Proximity induced topological state in graphene   The appearance of topologically protected states at the surface of an
ordinary insulator is a rare occurrence and to date only a handful of materials
are known for having this property. An intriguing question concerns the
possibility of forming topologically protected interfaces between different
materials. Here we propose that a topological phase can be transferred to
graphene by proximity with the three-dimensional topological insulator
Bi$_2$Se$_3$. By using density functional and transport theory we prove that,
at the verge of the chemical bond formation, a hybrid state forms at the
graphene/Bi$_2$Se$_3$ interface. The state has Dirac-cone-like dispersion at
the $\Gamma$ point and a well-defined helical spin-texture, indicating its
topologically protected nature. This demonstrates that proximity can transfer
the topological phase from Bi$_2$Se$_3$ to graphene.

11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph