Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tunable negative Poisson's ratio in hydrogenated graphene   We perform molecular dynamics simulations to investigate the effect of
hydrogenation on the Poisson's ratio of graphene. It is found that the value
for Poisson's ratio in graphene can be effectively tuned from positive to
negative by varying the percentage of hydrogenation. Specifically, the
Poisson's ratio decreases with the increase of the percentage of hydrogenation,
and reaches a minimum value of -0.04 at the percentage of hydrogenation about
50%. The Poisson's ratio starts to increase with a further increase of the
percentage of hydrogenation. The appearance of minimum negative Poisson's ratio
in the hydrogenated graphene is attributed to the suppression of the
hydrogenation-induced ripples during stretching of graphene. Our results
demonstrate that hydrogenation is a valuable approach for the tuning of the
Poisson's ratio from positive to negative in graphene.

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The categories of this paper are: physics
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The categories of this paper are: acc-phys
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-lat
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-ph
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The categories of this paper are: cs
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The categories of this paper are: nlin
37
The categories of this paper are: supr-con
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The categories of this paper are: astro-ph