Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Simulation study of pressure and temperature dependence of the negative
  thermal expansion in Zn(CN)$_2$   Pressure and temperature dependence of the negative thermal expansion in
Zn(CN)$_2$ is fully investigated using molecular dynamics simulations with a
built potential model. The advantage of this study allows us to reproduce all
the exotic behaviours of the material, including the negative thermal expansion
(NTE), the reduction of NTE with elevated temperature, the pressure enhancement
of NTE and the pressure-induced softening. Results of the study provide us
detailed data to link the properties in the energy space and the real space,
giving us insights to understand the properties and the connections between
them.

5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs