| Autor: |
Ding, Lei, Xu, Xianghan, Jeschke, Harald O., Bai, Xiaojian, Feng, Erxi, Alemayehu, Admasu Solomon, Kim, Jaewook, Huang, Feiting, Zhang, Qiang, Ding, Xiaxin, Harrison, Neil, Zapf, Vivien, Khomskii, Daniel, Mazin, Igor I., Cheong, Sang-Wook, Cao, Huibo |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
Nature Communications 12, 5339 (2021) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1038/s41467-021-25657-6 |
| Popis: |
A toroidal dipole moment appears independent of the electric and magnetic dipole moment in the multipole expansion of electrodynamics. It arises naturally from vortex-like arrangements of spins. Observing and controlling spontaneous long-range orders of toroidal moments are highly promising for spintronics but remain challenging. Here we demonstrate that a vortex-like spin configuration with a staggered arrangement of toroidal moments, a ferritoroidal state, is realized in a chiral triangular-lattice magnet BaCoSiO4. Upon applying a magnetic field, we observe multi-stair toroidal transitions correlating directly with metamagnetic transitions. We establish a first-principles microscopic Hamiltonian that explains both the formation of toroidal states and the metamagnetic toroidal transition as a combined effect of the magnetic frustration and the Dzyaloshinskii-Moriya interactions allowed by the crystallographic chirality in BaCoSiO4. |
| Databáze: |
arXiv |
| Externí odkaz: |
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