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Takahashi H, Suzuki H, Bertinshaw J, et al. Nonmagnetic J=0 State and Spin-Orbit Excitations in K_{2}RuCl_{6}. Phys Rev Lett. 2021;127(22):227201doi: 10.1103/PhysRevLett.127.227201.
Takahashi, H., Suzuki, H., Bertinshaw, J., Bette, S., Mühle, C., Nuss, J., Dinnebier, R., Yaresko, A., Khaliullin, G., Gretarsson, H., Takayama, T., Takagi, H., & Keimer, B. (2021). Nonmagnetic J=0 State and Spin-Orbit Excitations in K_{2}RuCl_{6}. Physical review letters, 127(22), 227201. https://doi.org/10.1103/PhysRevLett.127.227201
Takahashi, H, et al. "Nonmagnetic J=0 State and Spin-Orbit Excitations in K_{2}RuCl_{6}." Physical review letters vol. 127,22 (2021): 227201. doi: https://doi.org/10.1103/PhysRevLett.127.227201
Takahashi H, Suzuki H, Bertinshaw J, Bette S, Mühle C, Nuss J, Dinnebier R, Yaresko A, Khaliullin G, Gretarsson H, Takayama T, Takagi H, Keimer B. Nonmagnetic J=0 State and Spin-Orbit Excitations in K_{2}RuCl_{6}. Phys Rev Lett. 2021 Nov 24;127(22):227201. doi: 10.1103/PhysRevLett.127.227201. PMID: 34889637.
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Phys Rev Lett. 2021 Nov 24;127(22):227201. doi: 10.1103/PhysRevLett.127.227201.

Nonmagnetic J=0 State and Spin-Orbit Excitations in K_{2}RuCl_{6}.

Physical review letters

H Takahashi, H Suzuki, J Bertinshaw, S Bette, C Mühle, J Nuss, R Dinnebier, A Yaresko, G Khaliullin, H Gretarsson, T Takayama, H Takagi, B Keimer

Affiliations

  1. Max-Planck-Institut für Festkörperforschung, Heisenbergstraße 1, D-70569 Stuttgart, Germany.
  2. Department of Physics, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan.
  3. Deutsches Elektronen-Synchrotron DESY, Notkestrstraße 85, D-22607 Hamburg, Germany.
  4. Institute for Functional Matter and Quantum Technologies, University of Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany.

PMID: 34889637 DOI: 10.1103/PhysRevLett.127.227201

Abstract

Spin-orbit Mott insulators composed of t_{2g}^{4} transition metal ions may host excitonic magnetism due to the condensation of spin-orbital J=1 triplons. Prior experiments suggest that the 4d antiferromagnet Ca_{2}RuO_{4} embodies this notion, but a J=0 nonmagnetic state as a basis of the excitonic picture remains to be confirmed. We use Ru L_{3}-edge resonant inelastic x-ray scattering to reveal archetypal J multiplets with a J=0 ground state in the cubic compound K_{2}RuCl_{6}, which are well described within the LS-coupling scheme. This result highlights the critical role of unquenched orbital moments in 4d-electron compounds and calls for investigations of quantum criticality and excitonic magnetism on various crystal lattices.

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