Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Signatures of a topological phase transition in a planar Josephson
  junction   A growing body of work suggests that planar Josephson junctions fabricated
using superconducting hybrid materials provide a highly controllable route
toward one-dimensional topological superconductivity. Among the experimental
controls are in-plane magnetic field, phase difference across the junction, and
carrier density set by electrostatic gate voltages. Here, we investigate planar
Josephson junctions with an improved design based on an epitaxial InAs/Al
heterostructure, embedded in a superconducting loop, probed with integrated
quantum point contacts (QPCs) at both ends of the junction. For particular
ranges of in-plane field and gate voltages, a closing and reopening of the
superconducting gap is observed, along with a zero-bias conductance peak (ZBCP)
that appears upon reopening of the gap. Consistency with a simple theoretical
model supports the interpretation of a topological phase transition. While gap
closings and reopenings generally occurred together at the two ends of the
junction, the height, shape, and even presence of ZBCPs typically differed
between the ends, presumably due to disorder and variation of couplings to
local probes.

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The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
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The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
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The categories of this paper are: solv-int
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The categories of this paper are: q-fin
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The categories of this paper are: stat
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn