Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetic anisotropy in Shiba bound states across a quantum phase
  transition   The exchange coupling between magnetic adsorbates and a superconducting
substrate leads to Shiba states inside the superconducting energy gap and a
Kondo resonance outside the gap. The exchange coupling strength determines
whether the quantum many-body ground state is a Kondo singlet or a singlet of
the paired superconducting quasiparticles. Here, we use scanning tunneling
spectroscopy to identify the different quantum ground states of Manganese
phthalocyanine on Pb(111). We observe Shiba states, which are split into
triplets by magnetocrystalline anisotropy. Their characteristic spectral weight
yields an unambiguous proof of the nature of the quantum ground state.

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The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th