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題名 Electrically tunable spin polarization of chiral edge modes in a quantum anomalous Hall insulator
作者 Zhang, Rui-Xing
許琇娟
Hsu, Hsiu-Chuan
Liu, Chao-Xing
貢獻者 應物所
日期 2016-05
上傳時間 15-八月-2019 10:55:52 (UTC+8)
摘要 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.
關聯 Phys. Rev. B, Vol.93, pp.235315
資料類型 期刊論文
DOI https://doi.org/10.1103/PhysRevB.93.235315
dc.contributor 應物所
dc.creator (作者) Zhang, Rui-Xing
dc.creator (作者) 許琇娟
dc.creator (作者) Hsu, Hsiu-Chuan
dc.creator (作者) Liu, Chao-Xing
dc.date (日期) 2016-05
dc.date.accessioned 15-八月-2019 10:55:52 (UTC+8)-
dc.date.available 15-八月-2019 10:55:52 (UTC+8)-
dc.date.issued (上傳時間) 15-八月-2019 10:55:52 (UTC+8)-
dc.identifier.uri (URI) http://nccur.lib.nccu.edu.tw/handle/140.119/125216-
dc.description.abstract (摘要) 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.
dc.format.extent 1572860 bytes-
dc.format.mimetype application/pdf-
dc.relation (關聯) Phys. Rev. B, Vol.93, pp.235315
dc.title (題名) Electrically tunable spin polarization of chiral edge modes in a quantum anomalous Hall insulator
dc.type (資料類型) 期刊論文
dc.identifier.doi (DOI) 10.1103/PhysRevB.93.235315
dc.doi.uri (DOI) https://doi.org/10.1103/PhysRevB.93.235315