Journal
NATURE PHYSICS
Volume 9, Issue 9, Pages 563-569Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHYS2691
Keywords
-
Categories
Funding
- Strategic International Collaborative Research Program (SICORP), Japan Science and Technology Agency [21224009, 25000003]
- 'Funding Program for World-Leading Innovative RAMP
- D on Science and Technology (FIRST Program)' SPS, Japan
- US DoE, BES, Division of Materials Sciences and Engineering [DE-SC0008145]
- Grants-in-Aid for Scientific Research [24740211, 25103703, 25247056, 25000003] Funding Source: KAKEN
Ask authors/readers for more resources
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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available