Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evidence of Majorana fermions in an Al - InAs nanowire topological
  superconductor   Majorana fermions are the only fermionic particles that are expected to be
their own antiparticles. While elementary particles of the Majorana type were
not identified yet, quasi-particles with Majorana like properties, born from
interacting electrons in the solid, were predicted to exist. Here, we present
thorough experimental studies, backed by numerical simulations, of a system
composed of an aluminum superconductor in proximity to an indium arsenide
nanowire, with the latter possessing strong spin-orbit coupling. An induced 1d
topological superconductor - supporting Majorana fermions at both ends - is
expected to form. We concentrate on the characteristics of a distinct zero bias
conductance peak (ZBP), and its splitting in energy, both appearing only with a
small magnetic field applied along the wire. The ZBP was found to be robustly
tied to the Fermi energy over a wide range of system parameters. While not
providing a definite proof of a Majorana state, the presented data and the
simulations support strongly its existence.

19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org