Nonreciprocal transport in a room-temperature chiral magnet.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 40614194.
- Also identified by DOI 10.1126/sciadv.adw8023 and PMC identifier 12227041.
- Licence recorded as CC BY-NC.
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Abstract
Chiral magnets under broken time-reversal symmetry can give rise to rectification of moving electrons, called nonreciprocal transport. Several mechanisms, such as the spin fluctuation-induced chiral scattering and asymmetry in the electronic band dispersion with and without the relativistic spin-orbit interaction, have been proposed, but clear identification and theoretical description of these different contributions are desired for full understanding of nonreciprocal transport phenomena. Here, we investigate a chiral magnet Co<sub>8</sub>Zn<sub>9</sub>Mn<sub>3</sub> and find the nonreciprocal transport phenomena consisting of different contributions with distinct field and temperature dependence across the magnetic phase diagram over a wide temperature range including above room temperature. We successfully separate the nonreciprocal resistivity into different components and identify their mechanisms as spin fluctuation-induced chiral scattering and band asymmetry in a single material with the help of theoretical calculations.