| Autor: |
Lu Chen, Étienne Lefrançois, Ashvini Vallipuram, Quentin Barthélemy, Amirreza Ataei, Weiliang Yao, Yuan Li, Louis Taillefer |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
Nature Communications, Vol 15, Iss 1, Pp 1-7 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2041-1723 |
| DOI: |
10.1038/s41467-024-47858-5 |
| Popis: |
Abstract The thermal Hall effect has emerged as a potential probe of exotic excitations in spin liquids. In the Kitaev magnet $${{\alpha }}$$ α -RuCl3, the thermal Hall conductivity $${{{\kappa }}}_{{{xy}}}$$ κ x y has been attributed to Majorana fermions, chiral magnons, or phonons. Theoretically, the former two types of heat carriers can generate a “planar” $${{{\kappa }}}_{{{xy}}}$$ κ x y , whereby the magnetic field is parallel to the heat current, but it is unknown whether phonons also could. Here we show that a planar $${{{\kappa }}}_{{{xy}}}$$ κ x y is present in another Kitaev candidate material, Na2Co2TeO6. Based on the striking similarity between $${{{\kappa }}}_{{{xy}}}$$ κ x y and the phonon-dominated thermal conductivity $${{{\kappa }}}_{{{xx}}}$$ κ x x , we attribute the effect to phonons. We observe a large difference in $${{{\kappa }}}_{{{xy}}}$$ κ x y between different configurations of heat current and magnetic field, which reveals that the direction of heat current matters in determining the planar $${{{\kappa }}}_{{{xy}}}$$ κ x y . Our observation calls for a re-evaluation of the planar $${{{\kappa }}}_{{{xy}}}$$ κ x y observed in $$\,{{\alpha }}$$ α -RuCl3. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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