Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/101701
Title: Spin-orbit entangled j= 12 moments in Ba2CeIrO6: A frustrated fcc quantum magnet
Authors: Revelli, A.
Loo, C. C.
Kiese, D.
Becker, P.
Fröhlich, T.
Lorenz, T.
Moretti, Sala, M.
Monaco, G.
Buessen, F. L.
Attig, J.
Hermanns, M.
Streltsov, S. V.
Khomskii, D. I.
Van, Den, Brink, J.
Braden, M.
Van, Loosdrecht, P. H. M.
Trebst, S.
Paramekanti, A.
Grüninger, M.
Issue Date: 2019
Publisher: American Physical Society
Citation: Spin-orbit entangled j= 12 moments in Ba2CeIrO6: A frustrated fcc quantum magnet / A. Revelli, C. C. Loo, D. Kiese, et al. — DOI 10.1103/PhysRevB.100.085139 // Physical Review B. — 2019. — Vol. 100. — Iss. 8. — 085139.
Abstract: We establish the double perovskite Ba2CeIrO6 as a nearly ideal model system for j=1/2 moments, with resonant inelastic x-ray scattering indicating that the ideal j=1/2 state contributes by more than 99% to the ground-state wave function. The local j=1/2 moments form an fcc lattice and are found to order antiferromagnetically at TN=14K, more than an order of magnitude below the Curie-Weiss temperature. Model calculations show that the geometric frustration of the fcc Heisenberg antiferromagnet is further enhanced by a next-nearest neighbor exchange, and a significant size of the latter is indicated by ab initio theory. Our theoretical analysis shows that magnetic order is driven by a bond-directional Kitaev exchange and by local distortions via a strong magnetoelastic effect. Both, the suppression of frustration by Kitaev exchange and the strong magnetoelastic effect are typically not expected for j=1/2 compounds making Ba2CeIrO6 a riveting example for the rich physics of spin-orbit entangled Mott insulators. © 2019 American Physical Society.
Keywords: ANTIFERROMAGNETIC MATERIALS
CALCULATIONS
CERIUM COMPOUNDS
GROUND STATE
IRIDIUM COMPOUNDS
MOTT INSULATORS
PEROVSKITE
QUANTUM ENTANGLEMENT
WAVE FUNCTIONS
X RAY SCATTERING
CURIE-WEISS TEMPERATURE
DOUBLE PEROVSKITES
GEOMETRIC FRUSTRATION
GROUND STATE WAVEFUNCTIONS
HEISENBERG ANTIFERROMAGNETS
MAGNETOELASTIC EFFECTS
MODEL CALCULATIONS
RESONANT INELASTIC X-RAY SCATTERING
BARIUM COMPOUNDS
URI: http://hdl.handle.net/10995/101701
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85072555938
PURE ID: 10775427
cab90dc1-7ce1-4272-89ac-fba2df31ea23
ISSN: 24699950
DOI: 10.1103/PhysRevB.100.085139
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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