Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Topological Dirac semimetal phases in InSb/$\alpha$-Sn semiconductor
  superlattices   We demonstrate theoretically the coexistence of Dirac semimetal and
topological insulator phases in InSb/$\alpha$-Sn conventional semiconductor
superlattices, based on advanced first-principles calculations combined with
low-energy $k\cdot p$ theory. By proper interfaces designing, a large interface
polarization emerges when the growth direction is chosen along {[}111{]}. Such
an intrinsic polarized electrostatic field reduces band gap largely and invert
the band structure finally, leading to emerge of the topological Dirac
semimetal phase with a pair of Dirac nodes appearing along the (111)
crystallographic direction near the $\Gamma$ point. The surface states and
Fermi arc are clearly observed in (100) projected surface. In addition, we also
find a two-dimensional topological insulator phase with large nontrivial band
gap approaching 70 meV, which make it possible to observe the quantum spin Hall
effect at room temperature. Our proposal paves a way to realize topological
nontrivial phases coexisted in conventional semiconductor superlattices by
proper interface designing.

29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph