Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tuning the electronic structures of armchair graphene nanoribbons
  through chemical edge modification: A theoretical study   We report combined first-principle and tight-binding (TB) calculations to
simulate the effects of chemical edge modifications on structural and
electronic properties. The C-C bond lengths and bond angles near the GNR edge
have considerable changes when edge carbon atoms are bounded to different
atoms. By introducing a phenomenological hopping parameter $t_{1}$ for
nearest-neighboring hopping to represent various chemical edge modifications,
we investigated the electronic structural changes of nanoribbons with different
widths based on the tight-binding scheme. Theoretical results show that addends
can change the band structures of armchair GNRs and even result in observable
metal-to-insulator transition.

16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an