Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Classification and Distinction of Possible Insulating Phases in Twisted
  Bilayer Graphene by Impurity Effects   In this work the effects of impurity in various insulating phases of the
twisted bilayer graphene (TBG) are studied. The well-accepted continuum
model\cite{b} is employed and the local density of states (DOS) is calculated.
It is found that insulating phases breaking different symmetries proposed in
previous theories\cite{pa,op1,Lee_2019} are distinguishable via the number and
properties of in-gap bound state peaks induced by impurities in local DOS.
Insulating phases breaking the same previously proposed symmetries can be
further classified by the remaining anti-unitary symmetries and distinguished
by the corresponding remaining Kramers degeneracy of bound states. The in-gap
bound state peaks in local DOS and the degeneracy of the bound states can in
principle be detected in scanning tunnelling microscopy (STM) experiments, and
thus can help to the distinction of various insulating phases.

21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph