Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electric-field-induced Z2 topological phase transition in strained
  single bilayer Bi(111)   For controlling the critical electric fields of the topological phase
transition in single bilayer Bi(111), we investigated topological phases in a
strained system through first-principles calculations. We found a quadratic
band touching semimetallic state at tensile strain $\epsilon=0.5$%. Around this
strain, the topological phase can be switched to a trivial insulator by an
infinitesimal electric field. The positions at which Dirac cones appear in the
electric-field-induced topological phase transition changed for the strain
$\epsilon>0.5$% and $\epsilon<0.5$%. Our results indicate that this topological
phase transition could be applied to novel spintronic devices.

19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an