Electric-field-induced antiferromagnetic resonance in antiferromagnetic insulators with spin-orbit coupling
| Autor: | Takahiro Chiba, Akihiko Sekine |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Physics
Spin pumping Condensed matter physics Spin polarization General Physics and Astronomy Resonance 02 engineering and technology Spin–orbit interaction 021001 nanoscience & nanotechnology 01 natural sciences lcsh:QC1-999 Magnetic field Magnetization Electric field 0103 physical sciences Condensed Matter::Strongly Correlated Electrons 010306 general physics 0210 nano-technology Spin (physics) lcsh:Physics |
| Zdroj: | AIP Advances, Vol 7, Iss 5, Pp 055902-055902-5 (2017) |
| ISSN: | 2158-3226 |
| Popis: | We study theoretically spin dynamics in three-dimensional antiferromagnetic insulators with spin-orbit coupling. We focus on the antiferromagnetic insulators whose low-energy effective model possesses a topological term called the θ term. By solving the Landau-Lifshitz-Gilbert equation in the presence of the θ term, we show that the antiferromagnetic resonance can be realized by ac electric fields along with static magnetic fields. The antiferromagnetic resonance can be detected via the spin pumping from the Neel field and net magnetization. We calculate both contributions to the pumped spin current, and find that the magnitude of the ac electric field to cause the resonance state is very small (∼ 1 V/m). This indicates that spin currents can be generated efficiently. The mechanism of the antiferromagnetic resonance in this study is understood as the inverse process of the dynamical chiral magnetic effect. |
| Databáze: | OpenAIRE |
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