Doping Dependence of Collective Spin and Orbital Excitations in the Spin-1 Quantum Antiferromagnet La2-xSrxNiO4 Observed by X Rays

Fabbris, G.; Meyers, D.; Xu, L.; Katukuri, V. M.; Hozoi, L.; Liu, X.; Chen, Z. -Y.; Okamoto, J.; Schmitt, T.; Uldry, A.; Delley, B.; Gu, G. D.; Prabhakaran, D.; Boothroyd, A. T.; van den Brink, J.; Huang, D. J.; Dean, M. P.  M.

doi:10.1103/PhysRevLett.118.156402

Doping Dependence of Collective Spin and Orbital Excitations in the Spin-1 Quantum Antiferromagnet ${La}_{2 - x} {Sr}_{x} {NiO}_{4}$ Observed by X Rays

Journal Article · Wed Apr 12 00:00:00 EDT 2017 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.118.156402· OSTI ID:1351735

Fabbris, G. ^[1]; Meyers, D. ^[1]; Xu, L. ^[2]; Katukuri, V. M. ^[2]; Hozoi, L. ^[2]; Liu, X. ^[3]; Chen, Z. -Y. ^[4]; Okamoto, J. ^[4]; Schmitt, T. ^[5]; Uldry, A. ^[6]; Delley, B. ^[6]; Gu, G. D. ^[1]; Prabhakaran, D. ^[7]; Boothroyd, A. T. ^[7]; van den Brink, J. ^[2]; Huang, D. J. ^[8]; Dean, M. P. M. ^[1]

Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
Leibniz Inst. for Solid State and Materials Research (IFW), Dresden (Germany)
Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics and Inst. of Physics; Collaborative Innovation Center of Quantum Matter, Beijing (China)
National Synchrotron Radiation Research Center, Hsinchu (Taiwan)
Paul Scherrer Inst. (PSI), Villigen (Switzerland). Synchotron Radiation and Nanotechnology Research Dept.
Paul Scherrer Inst. (PSI), Villigen (Switzerland). Condensed Matter Theory Group
Univ. of Oxford (United Kingdom). Clarendon Lab., Dept. of Physics
National Synchrotron Radiation Research Center, Hsinchu (Taiwan); National Tsing Hua Univ., Hsinchu (Taiwan). Dept. of Physics

Here, we report the first empirical demonstration that resonant inelastic x-ray scattering (RIXS) is sensitive to collective magnetic excitations in S=1 systems by probing the Ni L₃ edge of La_2$$-$$xSr_xNiO₄ (x=0, 0.33, 0.45). The magnetic excitation peak is asymmetric, indicating the presence of single and multi-spin-flip excitations. As the hole doping level is increased, the zone boundary magnon energy is suppressed at a much larger rate than that in hole doped cuprates. Based on the analysis of the orbital and charge excitations observed by RIXS, we argue that this difference is related to the orbital character of the doped holes in these two families. Lastly, this work establishes RIXS as a probe of fundamental magnetic interactions in nickelates opening the way towards studies of heterostructures and ultrafast pump-probe experiments.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

OSTI ID:: 1351735

Alternate ID(s):: OSTI ID: 1351704

Report Number(s):: BNL--113724-2017-JA; KC0201060

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 15 Vol. 118; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Continuum Charge Excitations in High-Valence Transition-Metal Oxides Revealed by Resonant Inelastic X-Ray Scattering Hariki, Atsushi; Winder, Mathias; Kuneš, Jan Physical Review Letters, Vol. 121, Issue 12 https://doi.org/10.1103/physrevlett.121.126403	journal	September 2018
Site-Selective Probe of Magnetic Excitations in Rare-Earth Nickelates Using Resonant Inelastic X-ray Scattering Lu, Y.; Betto, D.; Fürsich, K. Physical Review X, Vol. 8, Issue 3 https://doi.org/10.1103/physrevx.8.031014	journal	July 2018
Measurement of the Resonant Magneto-Optical Kerr Effect Using a Free Electron Laser Yamamoto, Shingo; Matsuda, Iwao Applied Sciences, Vol. 7, Issue 7 https://doi.org/10.3390/app7070662	journal	June 2017
Continuum Charge Excitations in High-Valence Transition-Metal Oxides Revealed by Resonant Inelastic X-ray Scattering Hariki, Atsushi; Winder, Mathias; Kuneš, Jan arXiv https://doi.org/10.48550/arxiv.1803.03820	text	January 2018
Emergent c-axis magnetic helix in manganite-nickelate superlattices Fabbris, G.; Jaouen, N.; Meyers, D. arXiv https://doi.org/10.48550/arxiv.1806.04775	text	January 2018
Ultrafast dynamics of spin and orbital correlations in quantum materials: an energy- and momentum-resolved perspective Cao, Y.; Mazzone, D. G.; Meyers, D. arXiv https://doi.org/10.48550/arxiv.1809.06288	text	January 2018
Site-Selective Probe of Magnetic Excitations in Rare-Earth Nickelates Using Resonant Inelastic X-ray Scattering Lu, Y.; Betto, D.; Fürsich, K. Karlsruhe https://doi.org/10.5445/ir/1000084863	text	January 2018

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Doping Dependence of Collective Spin and Orbital Excitations in the Spin-1 Quantum Antiferromagnet ${La}_{2 - x} {Sr}_{x} {NiO}_{4}$ Observed by X Rays