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https://hdl.handle.net/10356/100839
Title: | Zeeman-type spin splitting controlled by an electric field | Authors: | Shimotani, Hidekazu Yuan, Hongtao Mohammad Saeed Bahramy Morimoto, Kazuhiro Wu, Sanfeng Arita, Ryotaro Nomura, Kentaro Yang, Bohm-Jung Suzuki, Ryuji Toh, Minglin Xu, Xiaodong Nagaosa, Naoto Iwasa, Yoshihiro Kloc, Christian |
Keywords: | DRNTU::Engineering::Materials | Issue Date: | 2013 | Source: | Yuan, H., Mohammad, S. B., Morimoto, K., Wu, S., Nomura, K., Yang, B. J., et al. (2013). Zeeman-type spin splitting controlled by an electric field. Nature physics, 9, 563-569. | Series/Report no.: | Nature physics | Abstract: | Transition-metal dichalcogenides such as WSe2 and MoS2 have electronic band structures that are ideal for hosting many exotic spin–orbit phenomena. Here we investigate the possibility to generate and modulate a giant Zeeman-type spin polarization in WSe2 under an external electric field. By tuning the perpendicular electric field applied to the WSe2 channel with an electric-double-layer transistor, we observe a systematic crossover from weak localization to weak anti-localization in magnetotransport. Our optical reflection measurements also reveal an electrically tunable exciton splitting. Using first-principles calculations, we propose that these are probably due to the emergence of a merely out-of-plane and momentum-independent spin splitting at and in the vicinity of the vertices of the WSe2 Brillouin zone under electric field. The non-magnetic approach for creating such an intriguing spin splitting keeps the system time-reversally invariant, thereby suggesting a new method for manipulating the spin degrees of freedom of electrons. | URI: | https://hdl.handle.net/10356/100839 http://hdl.handle.net/10220/16486 |
DOI: | 10.1038/nphys2691 | Schools: | School of Materials Science & Engineering | Fulltext Permission: | none | Fulltext Availability: | No Fulltext |
Appears in Collections: | MSE Journal Articles |
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