Strongly gapped spin-wave excitation in the insulating phase of NaOsO3

NaOsO3 hosts a rare manifestation of a metal-insulator transition driven by magnetic correlations, placing the magnetic exchange interactions in a central role. We use resonant inelastic x-ray scattering to directly probe these magnetic exchange interactions. A dispersive and strongly gapped (58 meV...

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Published in:Physical review. B 2017-01, Vol.95 (2), p.020413(R)
Main Authors: Calder, S, Vale, J G, Bogdanov, N, Donnerer, C, Pincini, D, Sala, M Moretti, Liu, X, Upton, M H, Casa, D, Shi, Y G, Tsujimoto, Y, Yamaura, K, Hill, J P, van den Brink, J, McMorrow, D F, Christianson, A D
Format: Article
Language:English
Subjects:
Anisotropy
Exchanging
Inelastic scattering
Insulators
Magnetism
Metal-insulator transition
Spin-orbit interactions
Wave excitation
X-ray scattering
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container_issue 2
container_start_page 020413(R)
container_title Physical review. B
container_volume 95
creator Calder, S
Vale, J G
Bogdanov, N
Donnerer, C
Pincini, D
Sala, M Moretti
Liu, X
Upton, M H
Casa, D
Shi, Y G
Tsujimoto, Y
Yamaura, K
Hill, J P
van den Brink, J
McMorrow, D F
Christianson, A D
description NaOsO3 hosts a rare manifestation of a metal-insulator transition driven by magnetic correlations, placing the magnetic exchange interactions in a central role. We use resonant inelastic x-ray scattering to directly probe these magnetic exchange interactions. A dispersive and strongly gapped (58 meV) excitation is observed, indicating appreciable spin-orbit coupling in this 5d3 system. The excitation is well described within a minimal model Hamiltonian with strong anisotropy and Heisenberg exchange (J1=J2=13.9meV). The observed behavior places NaOsO3 on the boundary between localized and itinerant magnetism.
doi_str_mv 10.1103/PhysRevB.95.020413
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source American Physical Society:Jisc Collections:APS Read and Publish 2023-2025 (reading list)
subjects Anisotropy
Exchanging
Inelastic scattering
Insulators
Magnetism
Metal-insulator transition
Spin-orbit interactions
Wave excitation
X-ray scattering
title Strongly gapped spin-wave excitation in the insulating phase of NaOsO3
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