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Strong Superexchange in a d
Lin, J Q; Villar Arribi, P; Fabbris, G; Botana, A S; Meyers, D; Miao, H; Shen, Y; Mazzone, D G; Feng, J; Chiuzbaian, S G; Nag, A; Walters, A C; García-Fernández, M; Zhou, Ke-Jin; Pelliciari, J; Jarrige, I; Freeland, J W; Zhang, Junjie; Mitchell, J F; Bisogni, V; Liu, X; Norman, M R; Dean, M P M.
Afiliación
  • Lin JQ; Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
  • Villar Arribi P; School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China.
  • Fabbris G; Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
  • Botana AS; University of Chinese Academy of Sciences, Beijing 100049, China.
  • Meyers D; Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, USA.
  • Miao H; Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
  • Shen Y; Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA.
  • Mazzone DG; Department of Physics, Arizona State University, Tempe, Arizona 85287, USA.
  • Feng J; Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
  • Chiuzbaian SG; Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078, USA.
  • Nag A; Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
  • Walters AC; Material Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA.
  • García-Fernández M; Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
  • Zhou KJ; Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
  • Pelliciari J; Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland.
  • Jarrige I; Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, UMR 7614, 4 place Jussieu, 75252 Paris Cedex 05, France.
  • Freeland JW; Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, UMR 7614, 4 place Jussieu, 75252 Paris Cedex 05, France.
  • Zhang J; Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette, France.
  • Mitchell JF; Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, United Kingdom.
  • Bisogni V; Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, United Kingdom.
  • Liu X; Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, United Kingdom.
  • Norman MR; Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, United Kingdom.
  • Dean MPM; National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, USA.
Phys Rev Lett ; 126(8): 087001, 2021 Feb 26.
Article en En | MEDLINE | ID: mdl-33709756
The discovery of superconductivity in a d^{9-δ} nickelate has inspired disparate theoretical perspectives regarding the essential physics of this class of materials. A key issue is the magnitude of the magnetic superexchange, which relates to whether cuprate-like high-temperature nickelate superconductivity could be realized. We address this question using Ni L-edge and O K-edge spectroscopy of the reduced d^{9-1/3} trilayer nickelates R_{4}Ni_{3}O_{8} (where R=La, Pr) and associated theoretical modeling. A magnon energy scale of ∼80 meV resulting from a nearest-neighbor magnetic exchange of J=69(4) meV is observed, proving that d^{9-δ} nickelates can host a large superexchange. This value, along with that of the Ni-O hybridization estimated from our O K-edge data, implies that trilayer nickelates represent an intermediate case between the infinite-layer nickelates and the cuprates. Layered nickelates thus provide a route to testing the relevance of superexchange to nickelate superconductivity.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos