Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chiral filtering in graphene with coupled valleys   We analyze the problem of electronic transmission through different regions
of a graphene sheet that are characterized by different types of connections
between the Dirac points. These valley symmetry breaking Hamiltonians might
arise from electronic self-interaction mediated by the dielectric environment
of distinct parts of the substrate on which the graphene sheet is placed. We
show that it is possible to have situations in which we can use these regions
to select or filter states of one desired chirality.

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The categories of this paper are: atom-ph
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom