Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Energy band of graphene ribbons under the tensile force   According to the tight-binding approximation, we investigate the electronic
structures of graphene ribbons with zigzag shaped edges (ZGRs) and armchair
shaped edges (AGRs) drawn by the tensile force, and obtain the analytic
relations between the energy bands of pi-electrons in ZGR, AGR and the tensile
force based on only considering the nearest-neighbor interaction and the
hydrogen-like atomic wave function is considered as pi-electron wave function.
Importantly, we find the tensile force can open an energy gap at the K point
for ZGR and AGR, and the force perpendicular to the zigzag edges can open
energy gap more easily besides the gap values of ZGR and AGR at the K point
both increase as the tensile force increases.

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The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int