Optical spin pumping induced pseudomagnetic field in two-dimensional heterostructures
Two-dimensional heterostructures are likely to provide new avenues for the manipulation of magnetization that is crucial for spintronics or magnetoelectronics. Here, we demonstrate that optical spin pumping can generate a large effective magnetic field in two-dimensional MoSe2/WSe2 heterostructures....
| Main Authors: | , , , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/140575 |
| _version_ | 1811686564130979840 |
|---|---|
| author | Jiang, Chongyun Abdullah Rasmita Xu, Weigao Imamoğlu, Atac Xiong, Qihua Gao, Wei-bo |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Jiang, Chongyun Abdullah Rasmita Xu, Weigao Imamoğlu, Atac Xiong, Qihua Gao, Wei-bo |
| author_sort | Jiang, Chongyun |
| collection | NTU |
| description | Two-dimensional heterostructures are likely to provide new avenues for the manipulation of magnetization that is crucial for spintronics or magnetoelectronics. Here, we demonstrate that optical spin pumping can generate a large effective magnetic field in two-dimensional MoSe2/WSe2 heterostructures. We determine the strength of the generated field by polarization-resolved measurement of the interlayer exciton photoluminescence spectrum: the measured splitting exceeding 10 millielectron volts (meV) between the emission originating from the two valleys corresponds to an effective magnetic field of ∼30 T. The strength of this optically induced field can be controlled by the excitation light polarization. Our finding opens up possibilities for optically controlled spintronic devices based on van der Waals heterostructures. |
| first_indexed | 2024-10-01T05:02:25Z |
| format | Journal Article |
| id | ntu-10356/140575 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:02:25Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1405752023-02-28T19:24:56Z Optical spin pumping induced pseudomagnetic field in two-dimensional heterostructures Jiang, Chongyun Abdullah Rasmita Xu, Weigao Imamoğlu, Atac Xiong, Qihua Gao, Wei-bo School of Electrical and Electronic Engineering School of Physical and Mathematical Sciences NOVITAS, Nanoelectronics Center of Excellence MajuLab, CNRS-Université de Nice-NUS-NTU International Joint Research Unit The Photonics Institute Centre for Disruptive Photonic Technologies Science::Physics Mesoscopic Systems Quantum Hall Effect Two-dimensional heterostructures are likely to provide new avenues for the manipulation of magnetization that is crucial for spintronics or magnetoelectronics. Here, we demonstrate that optical spin pumping can generate a large effective magnetic field in two-dimensional MoSe2/WSe2 heterostructures. We determine the strength of the generated field by polarization-resolved measurement of the interlayer exciton photoluminescence spectrum: the measured splitting exceeding 10 millielectron volts (meV) between the emission originating from the two valleys corresponds to an effective magnetic field of ∼30 T. The strength of this optically induced field can be controlled by the excitation light polarization. Our finding opens up possibilities for optically controlled spintronic devices based on van der Waals heterostructures. NRF (Natl Research Foundation, S’pore) ASTAR (Agency for Sci., Tech. and Research, S’pore) MOE (Min. of Education, S’pore) Published version 2020-05-31T05:36:08Z 2020-05-31T05:36:08Z 2018 Journal Article Jiang, C., Abdullah Rasmita, Xu, W., Imamoğlu, A., Xiong, Q., & Gao, W. (2018). Optical spin pumping induced pseudomagnetic field in two-dimensional heterostructures. Physical Review B, 98(24), 241410(R)-. doi:10.1103/PhysRevB.98.241410 2469-9950 https://hdl.handle.net/10356/140575 10.1103/PhysRevB.98.241410 2-s2.0-85058939883 24 98 en Physical Review B © 2018 American Physical Society (APS). All rights reserved. This paper was published in Physical Review B and is made available with permission of American Physical Society (APS). application/pdf |
| spellingShingle | Science::Physics Mesoscopic Systems Quantum Hall Effect Jiang, Chongyun Abdullah Rasmita Xu, Weigao Imamoğlu, Atac Xiong, Qihua Gao, Wei-bo Optical spin pumping induced pseudomagnetic field in two-dimensional heterostructures |
| title | Optical spin pumping induced pseudomagnetic field in two-dimensional heterostructures |
| title_full | Optical spin pumping induced pseudomagnetic field in two-dimensional heterostructures |
| title_fullStr | Optical spin pumping induced pseudomagnetic field in two-dimensional heterostructures |
| title_full_unstemmed | Optical spin pumping induced pseudomagnetic field in two-dimensional heterostructures |
| title_short | Optical spin pumping induced pseudomagnetic field in two-dimensional heterostructures |
| title_sort | optical spin pumping induced pseudomagnetic field in two dimensional heterostructures |
| topic | Science::Physics Mesoscopic Systems Quantum Hall Effect |
| url | https://hdl.handle.net/10356/140575 |
| work_keys_str_mv | AT jiangchongyun opticalspinpumpinginducedpseudomagneticfieldintwodimensionalheterostructures AT abdullahrasmita opticalspinpumpinginducedpseudomagneticfieldintwodimensionalheterostructures AT xuweigao opticalspinpumpinginducedpseudomagneticfieldintwodimensionalheterostructures AT imamogluatac opticalspinpumpinginducedpseudomagneticfieldintwodimensionalheterostructures AT xiongqihua opticalspinpumpinginducedpseudomagneticfieldintwodimensionalheterostructures AT gaoweibo opticalspinpumpinginducedpseudomagneticfieldintwodimensionalheterostructures |