Van der Waals engineering of ferromagnetic semiconductor heterostructures for spin and valleytronics
Abstract
The integration of magnetic material with semiconductors has been fertile ground for fundamental science as well as of great practical interest toward the seamless integration of information processing and storage. We create van der Waals heterostructures formed by an ultrathin ferromagnetic semiconductor CrI3 and a monolayer of WSe2. We observe unprecedented control of the spin and valley pseudospin in WSe2, where we detect a large magnetic exchange field of nearly 13 T and rapid switching of the WSe2 valley splitting and polarization via flipping of the CrI3 magnetization. The WSe2 photoluminescence intensity strongly depends on the relative alignment between photoexcited spins in WSe2 and the CrI3 magnetization, because of ultrafast spin-dependent charge hopping across the heterostructure interface. The photoluminescence detection of valley pseudospin provides a simple and sensitive method to probe the intriguing domain dynamics in the ultrathin magnet, as well as the rich spin interactions within the heterostructure.
- Authors:
-
- Univ. of Washington, Seattle, WA (United States)
- Carnegie Mellon Univ., Pittsburgh, PA (United States)
- National Inst. for Materials Science (NIMS), Tsukuba (Japan)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of Hong Kong (China)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1376521
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Science Advances
- Additional Journal Information:
- Journal Volume: 3; Journal Issue: 5; Journal ID: ISSN 2375-2548
- Publisher:
- AAAS
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Citation Formats
Zhong, Ding, Seyler, Kyle L., Linpeng, Xiayu, Cheng, Ran, Sivadas, Nikhil, Huang, Bevin, Schmidgall, Emma, Taniguchi, Takashi, Wantanabe, Kenji, McGuire, Michael A., Yao, Wang, Xiao, Di, Fu, Kai-Mei C., and Xu, Xiaodong. Van der Waals engineering of ferromagnetic semiconductor heterostructures for spin and valleytronics. United States: N. p., 2017.
Web. doi:10.1126/sciadv.1603113.
Zhong, Ding, Seyler, Kyle L., Linpeng, Xiayu, Cheng, Ran, Sivadas, Nikhil, Huang, Bevin, Schmidgall, Emma, Taniguchi, Takashi, Wantanabe, Kenji, McGuire, Michael A., Yao, Wang, Xiao, Di, Fu, Kai-Mei C., & Xu, Xiaodong. Van der Waals engineering of ferromagnetic semiconductor heterostructures for spin and valleytronics. United States. https://doi.org/10.1126/sciadv.1603113
Zhong, Ding, Seyler, Kyle L., Linpeng, Xiayu, Cheng, Ran, Sivadas, Nikhil, Huang, Bevin, Schmidgall, Emma, Taniguchi, Takashi, Wantanabe, Kenji, McGuire, Michael A., Yao, Wang, Xiao, Di, Fu, Kai-Mei C., and Xu, Xiaodong. Wed .
"Van der Waals engineering of ferromagnetic semiconductor heterostructures for spin and valleytronics". United States. https://doi.org/10.1126/sciadv.1603113. https://www.osti.gov/servlets/purl/1376521.
@article{osti_1376521,
title = {Van der Waals engineering of ferromagnetic semiconductor heterostructures for spin and valleytronics},
author = {Zhong, Ding and Seyler, Kyle L. and Linpeng, Xiayu and Cheng, Ran and Sivadas, Nikhil and Huang, Bevin and Schmidgall, Emma and Taniguchi, Takashi and Wantanabe, Kenji and McGuire, Michael A. and Yao, Wang and Xiao, Di and Fu, Kai-Mei C. and Xu, Xiaodong},
abstractNote = {The integration of magnetic material with semiconductors has been fertile ground for fundamental science as well as of great practical interest toward the seamless integration of information processing and storage. We create van der Waals heterostructures formed by an ultrathin ferromagnetic semiconductor CrI3 and a monolayer of WSe2. We observe unprecedented control of the spin and valley pseudospin in WSe2, where we detect a large magnetic exchange field of nearly 13 T and rapid switching of the WSe2 valley splitting and polarization via flipping of the CrI3 magnetization. The WSe2 photoluminescence intensity strongly depends on the relative alignment between photoexcited spins in WSe2 and the CrI3 magnetization, because of ultrafast spin-dependent charge hopping across the heterostructure interface. The photoluminescence detection of valley pseudospin provides a simple and sensitive method to probe the intriguing domain dynamics in the ultrathin magnet, as well as the rich spin interactions within the heterostructure.},
doi = {10.1126/sciadv.1603113},
journal = {Science Advances},
number = 5,
volume = 3,
place = {United States},
year = {Wed May 31 00:00:00 EDT 2017},
month = {Wed May 31 00:00:00 EDT 2017}
}
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