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|Title:||Zeeman-type spin splitting controlled by an electric field||Authors:||Shimotani, Hidekazu
Mohammad Saeed Bahramy
|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
|DOI:||10.1038/nphys2691||Fulltext Permission:||none||Fulltext Availability:||No Fulltext|
|Appears in Collections:||MSE Journal Articles|
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