Observation of Antiferromagnetic Magnon Pseudospin Dynamics and the Hanle effect
| Autor: | Wimmer, Tobias, Kamra, Akashdeep, Gückelhorn, Janine, Opel, Matthias, Geprägs, Stephan, Gross, Rudolf, Huebl, Hans, Althammer, Matthias |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Phys. Rev. Lett. 125, 247204 (2020) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.125.247204 |
| Popis: | We report on experiments demonstrating coherent control of magnon spin transport and pseudospin dynamics in a thin film of the antiferromagnetic insulator hematite utilizing two Pt strips for all-electrical magnon injection and detection. The measured magnon spin signal at the detector reveals an oscillation of its polarity as a function of the externally applied magnetic field. We quantitatively explain our experiments in terms of diffusive magnon transport and a coherent precession of the magnon pseudospin caused by the easy-plane anisotropy and the Dzyaloshinskii-Moriya interaction. This experimental observation can be viewed as the magnonic analogue of the electronic Hanle effect and the Datta-Das transistor, unlocking the high potential of antiferromagnetic magnonics towards the realization of rich electronics-inspired phenomena. Comment: 6 pages, 3 figures |
| Databáze: | arXiv |
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