Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Intrinsic Spin Susceptibility and Pseudogap-like Behavior in
  Infinite-Layer LaNiO2   The recent discovery of superconductivity in doped infinite-layer nickelates
has stimulated intensive interest, especially for similarities and differences
compared to that in cuprate superconductors. In contrast to cuprates, although
earlier magnetization measurement reveals a Curie-Weiss-like behavior in
undoped infinite-layer nickelates, there is no magnetic ordering observed by
elastic neutron scattering down to liquid helium temperature. Until now, the
nature of the magnetic ground state in undoped infinite-layer nickelates was
still elusive. Here, we perform a nuclear magnetic resonance (NMR) experiment
through 139La nuclei to study the intrinsic spin susceptibility of
infinite-layer LaNiO2. First, the signature for magnetic ordering or freezing
is absent in the 139La NMR spectrum down to 0.24 K, which unambiguously
confirms a paramagnetic ground state in LaNiO2. Second, a pseudogap-like
behavior instead of Curie-Weiss-like behavior is observed in both the
temperature-dependent Knight shift and nuclear spin-lattice relaxation rate
(1/T1), which is widely observed in both underdoped cuprates and iron-based
superconductors. Furthermore, the scaling behavior between the Knight shift and
1/T1T has also been discussed. Finally, the present results imply a
considerable exchange interaction in infinite-layer nickelates, which sets a
strong constraint for the proposed theoretical models.

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The categories of this paper are: eess
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The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
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The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
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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: comp-gas
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The categories of this paper are: nlin
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The categories of this paper are: acc-phys
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The categories of this paper are: cmp-lg
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The categories of this paper are: funct-an
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The categories of this paper are: quant-ph
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The categories of this paper are: q-alg
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The categories of this paper are: mtrl-th
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The categories of this paper are: supr-con