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Title: 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

Abstract

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 La2$-$xSrxNiO4 (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.

Authors:
 [1];  [1];  [2];  [2];  [2];  [3];  [4];  [4];  [5];  [6];  [6];  [1];  [7];  [7];  [2];  [8];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
  2. Leibniz Inst. for Solid State and Materials Research (IFW), Dresden (Germany)
  3. 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)
  4. National Synchrotron Radiation Research Center, Hsinchu (Taiwan)
  5. Paul Scherrer Inst. (PSI), Villigen (Switzerland). Synchotron Radiation and Nanotechnology Research Dept.
  6. Paul Scherrer Inst. (PSI), Villigen (Switzerland). Condensed Matter Theory Group
  7. Univ. of Oxford (United Kingdom). Clarendon Lab., Dept. of Physics
  8. National Synchrotron Radiation Research Center, Hsinchu (Taiwan); National Tsing Hua Univ., Hsinchu (Taiwan). Dept. of Physics
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1351735
Alternate Identifier(s):
OSTI ID: 1351704
Report Number(s):
BNL-113724-2017-JA
Journal ID: ISSN 0031-9007; PRLTAO; R&D Project: PO011; KC0201060; TRN: US1700539
Grant/Contract Number:  
SC00112704; 104747; 2015CB92130; XDB07020200; 1047478
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 118; Journal Issue: 15; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE

Citation Formats

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., and Dean, M. P. M.. Doping Dependence of Collective Spin and Orbital Excitations in the Spin-1 Quantum Antiferromagnet La2-xSrxNiO4 Observed by X Rays. United States: N. p., 2017. Web. https://doi.org/10.1103/PhysRevLett.118.156402.
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.. Doping Dependence of Collective Spin and Orbital Excitations in the Spin-1 Quantum Antiferromagnet La2-xSrxNiO4 Observed by X Rays. United States. https://doi.org/10.1103/PhysRevLett.118.156402
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., and Dean, M. P. M.. Wed . "Doping Dependence of Collective Spin and Orbital Excitations in the Spin-1 Quantum Antiferromagnet La2-xSrxNiO4 Observed by X Rays". United States. https://doi.org/10.1103/PhysRevLett.118.156402. https://www.osti.gov/servlets/purl/1351735.
@article{osti_1351735,
title = {Doping Dependence of Collective Spin and Orbital Excitations in the Spin-1 Quantum Antiferromagnet La2-xSrxNiO4 Observed by X Rays},
author = {Fabbris, G. and Meyers, D. and Xu, L. and Katukuri, V. M. and Hozoi, L. and Liu, X. and Chen, Z. -Y. and Okamoto, J. and Schmitt, T. and Uldry, A. and Delley, B. and Gu, G. D. and Prabhakaran, D. and Boothroyd, A. T. and van den Brink, J. and Huang, D. J. and Dean, M. P. M.},
abstractNote = {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 La2$-$xSrxNiO4 (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.},
doi = {10.1103/PhysRevLett.118.156402},
journal = {Physical Review Letters},
number = 15,
volume = 118,
place = {United States},
year = {2017},
month = {4}
}

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Cited by: 2 works
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