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Evolution of the Magnetic Excitations in NaOsO3 through its Metal-Insulator Transition

Vale, JG; Calder, S; Donnerer, C; Pincini, D; Shi, YG; Tsujimoto, Y; Yamaura, K; ... McMorrow, DF; + view all (2018) Evolution of the Magnetic Excitations in NaOsO3 through its Metal-Insulator Transition. Physical Review Letters , 120 (22) , Article 227203. 10.1103/PhysRevLett.120.227203. Green open access

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Abstract

The temperature dependence of the excitation spectrum in NaOsO 3 through its metal-to-insulator transition (MIT) at 410 K has been investigated using resonant inelastic x-ray scattering at the Os L 3 edge. High-resolution ( Δ E ∼ 56     meV ) measurements show that the well-defined, low-energy magnons in the insulating state weaken and dampen upon approaching the metallic state. Concomitantly, a broad continuum of excitations develops which is well described by the magnetic fluctuations of a nearly antiferromagnetic Fermi liquid. By revealing the continuous evolution of the magnetic quasiparticle spectrum as it changes its character from itinerant to localized, our results provide unprecedented insight into the nature of the MIT in NaOsO 3 [J. G. Vale, S. Calder, C. Donnerer, D. Pincini, Y. G. Shi, Y. Tsujimoto, K. Yamaura, M. M. Sala, J. van den Brink, A. D. Christianson, and D. F. McMorrow, Phys. Rev. B 97, 184429 (2018)].

Type: Article
Title: Evolution of the Magnetic Excitations in NaOsO3 through its Metal-Insulator Transition
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.120.227203
Publisher version: https://doi.org/10.1103/PhysRevLett.120.227203
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: RIXS, 5d transition metal oxides
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/10047447
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