Ultrafast Optical Control of Rashba Interactions in a TMDC Heterostructure
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arXiv
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| Auteurs principaux: | , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866911909117165568 |
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| author | Mittenzwey, Henry Kumar, Abhijeet Dhingra, Raghav Watanabe, Kenji Taniguchi, Takashi Gahl, Cornelius Bolotin, Kirill I. Selig, Malte Knorr, Andreas |
| author_facet | Mittenzwey, Henry Kumar, Abhijeet Dhingra, Raghav Watanabe, Kenji Taniguchi, Takashi Gahl, Cornelius Bolotin, Kirill I. Selig, Malte Knorr, Andreas |
| contents | We investigate spin relaxation dynamics of interlayer excitons in a MoSe2/MoS2 heterostructure induced by the Rashba effect. In such a system, Rashba interactions arise from an out-of-plane electric field due to photo-generated interlayer excitons inducing a phonon-assisted intravalley spin relaxation. We develop a theoretical description based on a microscopic approach to quantify the magnitude of Rashba interactions and test these predictions via time-resolved Kerr rotation measurements. In agreement with the calculations, we find that the Rashba-induced intravalley spin mixing becomes the dominating spin relaxation channel above T = 50 K. Our work identifies a previously unexplored spin-depolarization channel in heterostructures which can be used for ultrafast spin manipulation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_04454 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Ultrafast Optical Control of Rashba Interactions in a TMDC Heterostructure Mittenzwey, Henry Kumar, Abhijeet Dhingra, Raghav Watanabe, Kenji Taniguchi, Takashi Gahl, Cornelius Bolotin, Kirill I. Selig, Malte Knorr, Andreas Mesoscale and Nanoscale Physics Materials Science Optics Quantum Physics We investigate spin relaxation dynamics of interlayer excitons in a MoSe2/MoS2 heterostructure induced by the Rashba effect. In such a system, Rashba interactions arise from an out-of-plane electric field due to photo-generated interlayer excitons inducing a phonon-assisted intravalley spin relaxation. We develop a theoretical description based on a microscopic approach to quantify the magnitude of Rashba interactions and test these predictions via time-resolved Kerr rotation measurements. In agreement with the calculations, we find that the Rashba-induced intravalley spin mixing becomes the dominating spin relaxation channel above T = 50 K. Our work identifies a previously unexplored spin-depolarization channel in heterostructures which can be used for ultrafast spin manipulation. |
| title | Ultrafast Optical Control of Rashba Interactions in a TMDC Heterostructure |
| topic | Mesoscale and Nanoscale Physics Materials Science Optics Quantum Physics |
| url | https://arxiv.org/abs/2406.04454 |