title: Experimental observation of the quantum anomalous Hall effect in a magnetic topological insulator.
abstract: The quantized version of the anomalous Hall effect has been predicted to occur in magnetic topological insulators, but the experimental realization has been challenging. Here, we report the observation of the quantum anomalous Hall (QAH) effect in thin films of chromium-doped (Bi,Sb)2Te3, a magnetic topological insulator. At zero magnetic field, the gate-tuned anomalous Hall resistance reaches the predicted quantized value of h/e(2), accompanied by a considerable drop in the longitudinal resistance. Under a strong magnetic field, the longitudinal resistance vanishes, whereas the Hall resistance remains at the quantized value. The realization of the QAH effect may lead to the development of low-power-consumption electronics.
authors.affiliation: State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing, China.
authors.forename: Cui-Zu
authors.initials: CZ
authors.lastname: Chang
authors.forename: Jinsong
authors.initials: J
authors.lastname: Zhang
authors.forename: Xiao
authors.initials: X
authors.lastname: Feng
authors.forename: Jie
authors.initials: J
authors.lastname: Shen
authors.forename: Zuocheng
authors.initials: Z
authors.lastname: Zhang
authors.forename: Minghua
authors.initials: M
authors.lastname: Guo
authors.forename: Kang
authors.initials: K
authors.lastname: Li
authors.forename: Yunbo
authors.initials: Y
authors.lastname: Ou
authors.forename: Pang
authors.initials: P
authors.lastname: Wei
authors.forename: Li-Li
authors.initials: LL
authors.lastname: Wang
authors.forename: Zhong-Qing
authors.initials: ZQ
authors.lastname: Ji
authors.forename: Yang
authors.initials: Y
authors.lastname: Feng
authors.forename: Shuaihua
authors.initials: S
authors.lastname: Ji
authors.forename: Xi
authors.initials: X
authors.lastname: Chen
authors.forename: Jinfeng
authors.initials: J
authors.lastname: Jia
authors.forename: Xi
authors.initials: X
authors.lastname: Dai
authors.forename: Zhong
authors.initials: Z
authors.lastname: Fang
authors.forename: Shou-Cheng
authors.initials: SC
authors.lastname: Zhang
authors.forename: Ke
authors.initials: K
authors.lastname: He
authors.forename: Yayu
authors.initials: Y
authors.lastname: Wang
authors.forename: Li
authors.initials: L
authors.lastname: Lu
authors.forename: Xu-Cun
authors.initials: XC
authors.lastname: Ma
authors.forename: Qi-Kun
authors.initials: QK
authors.lastname: Xue