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| Autores principales: | , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2407.15657 |
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| _version_ | 1866916522590470144 |
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| author | Ma, Zeyu Ni, Danrui Kaib, David A. S. MacFarquharson, Kylie Pearce, John S. Cava, Robert J. Valenti, Roser Coldea, Radu Coldea, Amalia I. |
| author_facet | Ma, Zeyu Ni, Danrui Kaib, David A. S. MacFarquharson, Kylie Pearce, John S. Cava, Robert J. Valenti, Roser Coldea, Radu Coldea, Amalia I. |
| contents | In the Kitaev honeycomb model, spins coupled by strongly-frustrated anisotropic interactions do not order at low temperature but instead form a quantum spin liquid with spin fractionalization into Majorana fermions and static fluxes. The realization of such a model in crystalline materials could lead to major breakthroughs in understanding entangled quantum states, however achieving this in practice is a very challenging task. The recently synthesized honeycomb material RuI$_3$ shows no long-range magnetic order down to the lowest probed temperatures and has been theoretically proposed as a quantum spin liquid candidate material on the verge of an insulator to metal transition. Here we report a comprehensive study of the magnetic anisotropy in un-twinned single crystals via torque magnetometry and detect clear signatures of strongly anisotropic and frustrated magnetic interactions. We attribute the development of sawtooth and six-fold torque signal to strongly anisotropic, bond-dependent magnetic interactions by comparing to theoretical calculations. As a function of magnetic field strength at low temperatures, torque shows an unusual non-parabolic dependence suggestive of a proximity to a field-induced transition. Thus, RuI$_3$, without signatures of long-range magnetic order, displays key hallmarks of an exciting new candidate for extended Kitaev magnetism with enhanced quantum fluctuations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_15657 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Anisotropic magnetic interactions in a candidate Kitaev spin liquid close to a metal-insulator transition Ma, Zeyu Ni, Danrui Kaib, David A. S. MacFarquharson, Kylie Pearce, John S. Cava, Robert J. Valenti, Roser Coldea, Radu Coldea, Amalia I. Strongly Correlated Electrons Materials Science In the Kitaev honeycomb model, spins coupled by strongly-frustrated anisotropic interactions do not order at low temperature but instead form a quantum spin liquid with spin fractionalization into Majorana fermions and static fluxes. The realization of such a model in crystalline materials could lead to major breakthroughs in understanding entangled quantum states, however achieving this in practice is a very challenging task. The recently synthesized honeycomb material RuI$_3$ shows no long-range magnetic order down to the lowest probed temperatures and has been theoretically proposed as a quantum spin liquid candidate material on the verge of an insulator to metal transition. Here we report a comprehensive study of the magnetic anisotropy in un-twinned single crystals via torque magnetometry and detect clear signatures of strongly anisotropic and frustrated magnetic interactions. We attribute the development of sawtooth and six-fold torque signal to strongly anisotropic, bond-dependent magnetic interactions by comparing to theoretical calculations. As a function of magnetic field strength at low temperatures, torque shows an unusual non-parabolic dependence suggestive of a proximity to a field-induced transition. Thus, RuI$_3$, without signatures of long-range magnetic order, displays key hallmarks of an exciting new candidate for extended Kitaev magnetism with enhanced quantum fluctuations. |
| title | Anisotropic magnetic interactions in a candidate Kitaev spin liquid close to a metal-insulator transition |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2407.15657 |