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  Scale-invariant magnetic anisotropy in RuCl3 at high magnetic fields

Modic, K. A., McDonald, R. D., Ruff, J. P. C., Bachmann, M. D., Lai, Y., Palmstrom, J. C., et al. (2020). Scale-invariant magnetic anisotropy in RuCl3 at high magnetic fields. Nature Physics. doi:10.1038/s41567-020-1028-0.

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Modic, K. A.1, Author              
McDonald, Ross D.2, Author
Ruff, J. P. C.2, Author
Bachmann, Maja D.1, Author              
Lai, You2, Author
Palmstrom, Johanna C.2, Author
Graf, David2, Author
Chan, Mun K.2, Author
Balakirev, F. F.2, Author
Betts, J. B.2, Author
Boebinger, G. S.2, Author
Schmidt, Marcus3, Author              
Lawler, Michael J.2, Author
Sokolov, D. A.4, Author              
Moll, Philip J. W.1, Author              
Ramshaw, B. J.2, Author
Shekhter, Arkady2, Author
Affiliations:
1Physics of Microstructured Quantum Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_2466701              
2External Organizations, ou_persistent22              
3Marcus Schmidt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863415              
4Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              

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 Abstract: Scale-invariant magnetic anisotropy in RuCl(3)has been revealed through measurements of its magnetotropic coefficient, providing evidence for a high degree of exchange frustration that favours the formation of a spin liquid state. In RuCl3, inelastic neutron scattering and Raman spectroscopy reveal a continuum of non-spin-wave excitations that persists to high temperature, suggesting the presence of a spin liquid state on a honeycomb lattice. In the context of the Kitaev model, finite magnetic fields introduce interactions between the elementary excitations, and thus the effects of high magnetic fields that are comparable to the spin-exchange energy scale must be explored. Here, we report measurements of the magnetotropic coefficient-the thermodynamic coefficient associated with magnetic anisotropy-over a wide range of magnetic fields and temperatures. We find that magnetic field and temperature compete to determine the magnetic response in a way that is independent of the large intrinsic exchange-interaction energy. This emergent scale-invariant magnetic anisotropy provides evidence for a high degree of exchange frustration that favours the formation of a spin liquid state in RuCl3.

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Language(s): eng - English
 Dates: 2020-10-052020-10-05
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: ISI: 000575344700003
DOI: 10.1038/s41567-020-1028-0
 Degree: -

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Title: Nature Physics
  Other : Nat. Phys.
Source Genre: Journal
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Publ. Info: London : Nature Pub. Group
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: ISSN: 1745-2473
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000025850