Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Conversion of a conventional superconductor into a topological
  superconductor by topological proximity effect   Realization of topological superconductors (TSCs) hosting Majorana fermions
is a central challenge in condensed-matter physics. One approach is to use the
superconducting proximity effect (SPE) in heterostructures, where a topological
insulator contacted with a superconductor hosts an effective p-wave pairing by
the penetration of Cooper pairs across the interface. However, this approach
suffers a difficulty in accessing the topological interface buried deep beneath
the surface. Here, we propose an alternative approach to realize topological
superconductivity without SPE. In a Pb(111) thin film grown on TlBiSe2, we
discover that the Dirac-cone state of substrate TlBiSe2 migrates to the top
surface of Pb film and obtains an energy gap below the superconducting
transition temperature of Pb. This suggests that a BCS superconductor is
converted into a TSC by the topological proximity effect. Our discovery opens a
route to manipulate topological superconducting properties of materials.

36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph