Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Strain-tunable energy band parameters of graphene-like GaN   We present ab initio calculations on the effect of in-plane equi-biaxial
strain on the structural and electronic properties of hypothetical
graphene-like GaN monolayer (ML-GaN). It was found that ML-GaN got buckled for
compressive strain in excess of 7.281 %; buckling parameter increased
quadratic-ally with compressive strain. The 2D bulk modulus of ML-GaN was found
to be smaller than that of graphene and graphene-like ML-BN, which reflects
weaker bond in ML-GaN. More importantly, the band gap and effective masses of
charge carriers in ML-GaN were found to be tunable by application of in-plane
equi-biaxial strain. In particular, when compressive biaxial strain of about 3
% was reached, a transition from indirect to direct band gap-phase occurred
with significant change in the value and nature of effective masses of charge
carriers; buckling and tensile strain reduced the band gap - the band gap
reduced to 50 % of its unstrained value at 6.36 % tensile strain and to 0 eV at
an extrapolated tensile strain of 12.72 %, which is well within its predicted
ultimate tensile strain limit of 16 %. These predictions of strain-engineered
electronic properties of highly strain sensitive ML-GaN may be exploited in
future for potential applications in strain sensors and other nano-devices such
as the nano-electromechanical systems (NEMS).

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The categories of this paper are: q-bio
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
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The categories of this paper are: acc-phys
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The categories of this paper are: dg-ga
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The categories of this paper are: math
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
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The categories of this paper are: adap-org