Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two-dimensional ferroelastic semiconductors in Nb2SiTe4 and Nb2GeTe4
  with promising electronic properties   Two-dimensional crystals with coupling of ferroelasticity and attractive
electronic properties offer unprecedent opportunities for achieving long-sought
controllable devices. But so far, the reported proposals are mainly based on
hypothetical structures. Here, using first-principles calculations, we identify
single-layer Nb2ATe4 (A = Si, Ge), which could be exfoliated from their layered
bulks, are promising candidates. Single-layer Nb2ATe4 are found to be
dynamically, thermally and chemically stable. They possess excellent
ferroelasticity with high reversible ferroelastic strain and moderate
ferroelastic transition energy barrier, beneficial for practical applications.
Meanwhile, they harbor outstanding anisotropic electronic properties, including
anisotropic carrier mobility and optical properties. More importantly, the
anisotropic properties of single-layer Nb2ATe4 can be efficiently controlled
through ferroelastic switching. These appealing properties combined with the
experimental feasibility render single-layer Nb2ATe4 extraordinary platforms
for realizing controllable devices.

19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th