Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Inversion-symmetry protected chiral hinge states in stacks of doped
  quantum Hall layers   We prove the existence of higher-order topological insulators with protected
chiral hinge modes in quasi-two-dimensional systems made out of coupled layers
stacked in an inversion-symmetric manner. In particular, we show that an
external magnetic field drives a stack of alternating p- and n-doped buckled
honeycomb layers into a higher-order topological phase, characterized by a
non-trivial three-dimensional ${\mathbb Z}_2$ invariant. We identify silicene
multilayers as a potential material platform for the experimental detection of
this novel topological insulating phase.

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The categories of this paper are: stat
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
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The categories of this paper are: eess
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
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The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th