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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Bibliographic Details
Published in:arXiv.org 2017-07
Main Authors: Calder, S, Vale, J G, Bogdanov, N, Donnerer, C, Pincini, D, M Moretti Sala, 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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Summary: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=13.9 meV). The observed behavior places NaOsO3 on the boundary between localized and itinerant magnetism.
ISSN:2331-8422
DOI:10.48550/arxiv.1608.08477