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Zeeman-type spin splitting controlled by an electric field

หน่วยงาน Nanyang Technological University, Singapore

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ชื่อเรื่อง : Zeeman-type spin splitting controlled by an electric field
นักวิจัย : Yuan, Hongtao , Mohammad Saeed Bahramy , Morimoto, Kazuhiro , Wu, Sanfeng , Nomura, Kentaro , Yang, Bohm-Jung , Shimotani, Hidekazu , Suzuki, Ryuji , Toh, Minglin , Kloc, Christian , Xu, Xiaodong , Arita, Ryotaro , Nagaosa, Naoto , Iwasa, Yoshihiro
คำค้น : DRNTU::Engineering::Materials
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2556
อ้างอิง : 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. , http://hdl.handle.net/10220/16486 , http://dx.doi.org/10.1038/nphys2691
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Nature physics
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

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.

บรรณานุกรม :
Yuan, Hongtao , Mohammad Saeed Bahramy , Morimoto, Kazuhiro , Wu, Sanfeng , Nomura, Kentaro , Yang, Bohm-Jung , Shimotani, Hidekazu , Suzuki, Ryuji , Toh, Minglin , Kloc, Christian , Xu, Xiaodong , Arita, Ryotaro , Nagaosa, Naoto , Iwasa, Yoshihiro . (2556). Zeeman-type spin splitting controlled by an electric field.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Yuan, Hongtao , Mohammad Saeed Bahramy , Morimoto, Kazuhiro , Wu, Sanfeng , Nomura, Kentaro , Yang, Bohm-Jung , Shimotani, Hidekazu , Suzuki, Ryuji , Toh, Minglin , Kloc, Christian , Xu, Xiaodong , Arita, Ryotaro , Nagaosa, Naoto , Iwasa, Yoshihiro . 2556. "Zeeman-type spin splitting controlled by an electric field".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Yuan, Hongtao , Mohammad Saeed Bahramy , Morimoto, Kazuhiro , Wu, Sanfeng , Nomura, Kentaro , Yang, Bohm-Jung , Shimotani, Hidekazu , Suzuki, Ryuji , Toh, Minglin , Kloc, Christian , Xu, Xiaodong , Arita, Ryotaro , Nagaosa, Naoto , Iwasa, Yoshihiro . "Zeeman-type spin splitting controlled by an electric field."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2556. Print.
Yuan, Hongtao , Mohammad Saeed Bahramy , Morimoto, Kazuhiro , Wu, Sanfeng , Nomura, Kentaro , Yang, Bohm-Jung , Shimotani, Hidekazu , Suzuki, Ryuji , Toh, Minglin , Kloc, Christian , Xu, Xiaodong , Arita, Ryotaro , Nagaosa, Naoto , Iwasa, Yoshihiro . Zeeman-type spin splitting controlled by an electric field. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2556.