Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charge Localization and Hopping in a Topologically Engineered GNR   Graphene nanoribbons (GNRs) are promising two-dimensional materials with
various technological applications, in particular for the armchair GNR families
that have a semiconductor character. Recently, methods that allowed for the
control of GNR's topology have been developed, resulting in the production of
nanoribbons composed of alternating segments of two distinct armchair GNR
families (7 and 9-AGNRs) connected in heterojunctions. This GNR displays two
topological bands that lie between the valence and conduction bands that
effectively modulates the nanoribbon bandgap. Here, we employ a two-dimensional
extension of the Su-Schrieffer-Heeger model to study morphological and
electronic properties of this new material in both neutral and charged states.
Results demonstrate that charge injection in this system results in the
formation of polarons that localize strictly in the 9-AGNRs segments of the
system and whose mobility is highly impaired by the system's topology. We
further show polaron displacement by means of hopping between 9-AGNR portions
of the system, suggesting this mechanism for charge transport in this material.

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The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas