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Strong superexchange in a d9−δ nickelate revealed by resonant inelastic X-ray scattering
DOI:
10.1103/PhysRevLett.126.087001
Authors:
J. Q.
Lin
(Brookhaven National Laboratory; ShanghaiTech University; Institute of Physics, Chinese Academy of Sciences; University of Chinese Academy of Science)
,
P.
Villar Arribi
(Argonne National Laboratory)
,
G.
Fabbris
(Brookhaven National Laboratory; Advanced Photon Source)
,
A. S.
Botana
(Arizona State University)
,
D.
Meyers
(Brookhaven National Laboratory; Oklahoma State University)
,
H.
Miao
(Brookhaven National Laboratory; Oak Ridge National Laboratory)
,
Y.
Shen
(Brookhaven National Laboratory)
,
D. G.
Mazzone
(Brookhaven National Laboratory; Paul Scherrer Institut)
,
J.
Feng
(Sorbonne Université, CNRS)
,
G. S.
Chiuzbaian
(Sorbonne Université, CNRS; Synchrotron SOLEIL)
,
A.
Nag
(Diamond Light Source)
,
A. C.
Walters
(Diamond Light Source)
,
M.
Garcia-Fernandez
(Diamond Light Source)
,
K.-J.
Zhou
(Diamond Light Source; Swiss Light Source)
,
J.
Pelliciari
(National Synchrotron Light Source II)
,
I.
Jarrige
(National Synchrotron Light Source II)
,
J. W.
Freeland
(Advanced Photon Source)
,
J.
Zhang
(Argonne National Laboratory; Shandong University)
,
J. F.
Mitchell
(Argonne National Laboratory)
,
V.
Bisogni
(National Synchrotron Light Source II)
,
X.
Liu
(ShanghaiTech University)
,
M. R.
Norman
(Argonne National Laboratory)
,
M. P. M.
Dean
(Brookhaven National Laboratory)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Physical Review Letters
, VOL 126
State:
Published (Approved)
Published:
February 2021
Diamond Proposal Number(s):
18519
Abstract: 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.
Journal Keywords: Magnetic coupling; Magnetic interactions; Magnons; Superconducting phase transition; High-temperature superconductors; Strongly correlated systems; Resonant inelastic x-ray scattering
Subject Areas:
Materials,
Physics
Instruments:
I21-Resonant Inelastic X-ray Scattering (RIXS)
Other Facilities: SIX beamline at National Synchrotron Light Source II; SEXTANTS beamline at Synchrotron SOLEIL
Added On:
28/02/2021 21:11
Discipline Tags:
Superconductors
Quantum Materials
Hard condensed matter - electronic properties
Physics
Materials Science
Technical Tags:
Scattering
Resonant Inelastic X-ray Scattering (RIXS)