Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Visualization of Topological Boundary Modes Manifesting Topological
  Nodal-Point Superconductivity   The extension of the topological classification of band insulators to
topological semimetals gave way to the topology classes of Dirac, Weyl, and
nodal line semimetals with their unique Fermi arc and drum head boundary modes.
Similarly, there are several suggestions to employ the classification of
topological superconductors for topological nodal superconductors with Majorana
boundary modes. Here, we show that the surface 1H termination of the transition
metal dichalcogenide compound 4Hb-TaS$_2$, in which 1T-TaS$_2$ and 1H-TaS$_2$
layers are interleaved, has the phenomenology of a topological nodal point
superconductor. We find in scanning tunneling spectroscopy a residual density
of states within the superconducting gap. An exponentially decaying bound mode
is imaged within the superconducting gap along the boundaries of the exposed 1H
layer characteristic of a gapless Majorana edge mode. The anisotropic nature of
the localization length of the edge mode aims towards topological nodal
superconductivity. A zero-bias conductance peak is further imaged within fairly
isotropic vortex cores. All our observations are accommodated by a theoretical
model of a two-dimensional nodal Weyl-like superconducting state, which ensues
from inter-orbital Cooper pairing. The observation of an intrinsic topological
nodal superconductivity in a layered material will pave the way for further
studies of Majorana edge modes and its applications in quantum information
processing.

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The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
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The categories of this paper are: q-fin
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The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
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The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
18
The categories of this paper are: econ