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Electronic structure of the parent compound of superconducting infinite-layer nickelates

Journal Article · · Nature Materials
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  1. Max Planck Inst. for Solid State Research, Stuttgart (Germany); SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES)
  3. Paul Scherrer Inst. (PSI), Villigen (Switzerland). Swiss Light Source
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  5. Science and Technology Facilities Council (STFC), Oxford (United Kingdom). Diamond Light Source, Ltd.
  6. National Synchrotron Radiation Research Center, Hsinchu (Taiwan)
  7. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES); Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials
  8. Leiden Univ. (Netherlands)
The search continues for nickel oxide-based materials with electronic properties similar to cuprate high-temperature superconductors. The recent discovery of superconductivity in the doped infinite-layer nickelate NdNiO2 has strengthened these efforts. In this work, we use X-ray spectroscopy and density functional theory to show that the electronic structure of LaNiO2 and NdNiO2, while similar to the cuprates, includes significant distinctions. Unlike cuprates, the rare-earth spacer layer in the infinite-layer nickelate supports a weakly interacting three-dimensional 5d metallic state, which hybridizes with a quasi-two-dimensional, strongly correlated state with $$3d_{x^2-y^2}$$ symmetry in the NiO2 layers. Thus, the infinite-layer nickelate can be regarded as a sibling of the rare-earth intermetallics which are well known for heavy fermion behaviour, where the NiO2 correlated layers play an analogous role to the 4f states in rare-earth heavy fermion compounds. This Kondo- or Anderson-lattice-like ‘oxide-intermetallic’ replaces the Mott insulator as the reference state from which superconductivity emerges upon doping.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
Gordon and Betty Moore Foundation; Swiss National Science Foundation (SNF); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
AC02-05CH11231; AC02-76SF00515
OSTI ID:
1605376
Alternate ID(s):
OSTI ID: 1631643
Journal Information:
Nature Materials, Journal Name: Nature Materials Journal Issue: 4 Vol. 19; ISSN 1476-1122
Publisher:
Springer Nature - Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (7)

DMFTwDFT: An open-source code combining Dynamical Mean Field Theory with various Density Functional Theory packages text January 2020
Induced magnetic two-dimensionality by hole doping in the superconducting infinite-layer nickelate Nd 1 − x Sr x NiO 2 journal February 2020
Materials design of dynamically stable d 9 layered nickelates journal February 2020
Late transition metal oxides with infinite-layer structure: Nickelates versus cuprates journal February 2020
Effective Hamiltonian for nickelate oxides Nd 1 − x Sr x NiO 2 journal February 2020
Magnetic penetration depth and T c in superconducting nickelates journal February 2020
Late transition-metal oxides with infinite-layer structure: Nickelates versus cuprates text January 2019

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