Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Combining quantum spin hall effect and superconductivity in few-layer
  stanene   Stanene was proposed to be a quantum spin hall insulator containing
topological edges states and a time reversal invariant topological
superconductor hosting helical Majorana edge mode. Recently, experimental
evidences of existence of topological edge states have been found in monolayer
stanene films and superconductivity has been observed in few-layer stanene
films excluding single layer. An integrated system with both topological edge
states and superconductivity are higly pursued as a possible platform to
realize topological superconductivity. Few-layer stanene show great potential
to meet this requirement and is highly desired in experiment. Here we
successfully grow few-layer stanene on bismuth (111) substrate. Both
topological edge states and superconducting gaps are observed by in-situ
scanning tunneling microscopy/spectroscopy (STM/STS). Our results take a
further step towards topological superconductivity by stanene films.

10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys