Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Some Factors Leading to Asymmetry in Electronic Spectrum of Bilayer
  Graphene   We have investigated the effects of inplane and interplane nearest neighbour
overlap integrals ($s_0$ and $s_1$) and site energy difference between atoms in
two different sublattices in the same graphene layer ($\Delta$) on the
electronic dispersion of bilayer graphene within tight binding model. Also,
modifications in bilayer graphene bands due to inplane next nearest neighbour
interactions ($\gamma_{1i}$, $s_{1i}$) and next to next nearest neighbour
interactions ($\gamma_{2i}$, $s_{2i}$) have been studied. It is observed that
$s_1$ introduces further asymmetry in energy positions of top conduction band
and bottom valence band at the $K$ point on top of the asymmetry due to
$\Delta$. Moreover, $s_0$, $s_1$ as well as the other inplane coupling
parameters induce noticable electron-hole asymmetry in the slope of the bands
and changes in band widths. The density of states of bilayer graphene has also
been calculated within the same model.

27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
14
The categories of this paper are: math-ph