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  Electronically highly cubic conditions for Ru in alpha-RuCl3

Agrestini, S., Kuo, C.-Y., Ko, K.-T., Hu, Z., Kasinathan, D., Vasili, H. B., et al. (2017). Electronically highly cubic conditions for Ru in alpha-RuCl3. Physical Review B, 96(16): 161107, pp. 1-5. doi:10.1103/PhysRevB.96.161107.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-184B-F Version Permalink: http://hdl.handle.net/21.11116/0000-0001-9CCA-C
Genre: Journal Article

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 Creators:
Agrestini, S.1, Author              
Kuo, C.-Y.2, Author              
Ko, K.-T.3, Author              
Hu, Z.4, Author              
Kasinathan, D.2, Author              
Vasili, H. B.5, Author
Herrero-Martin, J.5, Author
Valvidares, S. M.5, Author
Pellegrin, E.5, Author
Jang, L.-Y.5, Author
Henschel, A.6, Author              
Schmidt, M.7, Author              
Tanaka, A.5, Author
Tjeng, L. H.8, Author              
Affiliations:
1Stefano Agrestini, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863459              
2Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
3Kyung-Tae Ko, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863451              
4Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863461              
5External Organizations, ou_persistent22              
6Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              
7Marcus Schmidt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863415              
8Liu Hao Tjeng, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863452              

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 Abstract: We studied the local Ru 4d electronic structure of alpha-RuCl3 by means of polarization-dependent x-ray absorption spectroscopy at the Ru L-2,L-3 edges. We observed a vanishingly small linear dichroism indicating that electronically the Ru 4d local symmetry is highly cubic. Using full multiplet cluster calculations we were able to reproduce the spectra excellently and to extract that the trigonal splitting of the t(2g) orbitals is -12 +/- 10 meV, i.e., negligible as compared to the Ru 4d spin-orbit coupling constant. Consistent with our magnetic circular dichroism measurements, we found that the ratio of the orbital and spin moments is 2.0, the value expected for a J(eff) = 1/2 ground state. We have thus shown that as far as the Ru 4d local properties are concerned, alpha-RuCl3 is an ideal candidate for the realization of Kitaev physics.

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Language(s): eng - English
 Dates: 2017-10-122017-10-12
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 96 (16) Sequence Number: 161107 Start / End Page: 1 - 5 Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008