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政大典藏 > College of Science > Graduate Institute of Applied Physics > Periodical Articles > Item 140.119/125216

Please use this identifier to cite or link to this item: https://nccur.lib.nccu.edu.tw/handle/140.119/125216

Title:	Electrically tunable spin polarization of chiral edge modes in a quantum anomalous Hall insulator
Authors:	Zhang, Rui-Xing 許琇娟 Hsu, Hsiu-Chuan Liu, Chao-Xing
Contributors:	應物所
Date:	2016-05
Issue Date:	2019-08-15 10:55:52 (UTC+8)
Abstract:	In the quantum anomalous Hall effect, chiral edge modes are expected to conduct spin polarized current without dissipation and thus hold great promise for future electronics and spintronics with low energy consumption. However, spin polarization of chiral edge modes has never been established in experiments. In this work, we theoretically study spin polarization of chiral edge modes in the quantum anomalous Hall effect, based on both the effective model and more realistic tight-binding model constructed from the first principles calculations. We find that spin polarization can be manipulated by tuning either a local gate voltage or the Fermi energy. We also propose to extract spin information of chiral edge modes by contacting the quantum anomalous Hall insulator to a ferromagnetic (FM) lead. The establishment of spin polarization of chiral edge modes, as well as the manipulation and detection in a fully electrical manner, will pave the way to the applications of the quantum anomalous Hall effect in spintronics.
Relation:	Phys. Rev. B, Vol.93, pp.235315
Data Type:	期刊論文
DOI link:	https://doi.org/10.1103/PhysRevB.93.235315
DOI:	10.1103/PhysRevB.93.235315
Appears in Collections:	[Graduate Institute of Applied Physics] Periodical Articles

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