Observation of Terahertz Spin Hall Conductivity Spectrum in GaAs with Optical Spin Injection
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2023
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866929203219267584 |
|---|---|
| author | Fujimoto, Tomohiro Kurihara, Takayuki Murotani, Yuta Tamaya, Tomohiro Kanda, Natsuki Kim, Changsu Yoshinobu, Jun Akiyama, Hidefumi Kato, Takeo Matsunaga, Ryusuke |
| author_facet | Fujimoto, Tomohiro Kurihara, Takayuki Murotani, Yuta Tamaya, Tomohiro Kanda, Natsuki Kim, Changsu Yoshinobu, Jun Akiyama, Hidefumi Kato, Takeo Matsunaga, Ryusuke |
| contents | We report the first observation of the spin Hall conductivity spectrum in GaAs at room temperature. Our terahertz polarimetry with a precision of several $μ$rads resolves the Faraday rotation of terahertz pulses arising from the inverse spin Hall effect of optically injected spin-polarized electrons. The obtained spin Hall conductivity spectrum exhibits an excellent quantitative agreement with theory, demonstrating a crossover in the dominant origin from impurity scattering in the DC regime to the intrinsic Berry-curvature mechanism in the terahertz regime. Our spectroscopic technique opens a new pathway to analyze anomalous transports related to spin, valley, or orbital degrees of freedom. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_09155 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Observation of Terahertz Spin Hall Conductivity Spectrum in GaAs with Optical Spin Injection Fujimoto, Tomohiro Kurihara, Takayuki Murotani, Yuta Tamaya, Tomohiro Kanda, Natsuki Kim, Changsu Yoshinobu, Jun Akiyama, Hidefumi Kato, Takeo Matsunaga, Ryusuke Materials Science We report the first observation of the spin Hall conductivity spectrum in GaAs at room temperature. Our terahertz polarimetry with a precision of several $μ$rads resolves the Faraday rotation of terahertz pulses arising from the inverse spin Hall effect of optically injected spin-polarized electrons. The obtained spin Hall conductivity spectrum exhibits an excellent quantitative agreement with theory, demonstrating a crossover in the dominant origin from impurity scattering in the DC regime to the intrinsic Berry-curvature mechanism in the terahertz regime. Our spectroscopic technique opens a new pathway to analyze anomalous transports related to spin, valley, or orbital degrees of freedom. |
| title | Observation of Terahertz Spin Hall Conductivity Spectrum in GaAs with Optical Spin Injection |
| topic | Materials Science |
| url | https://arxiv.org/abs/2305.09155 |