这个得转，实验观察到以前理论预测的量子反常霍尔效应，据某人说是诺奖级成果，拭目以待！来自清华大学和物理所，还有一个作者属于斯坦福。
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/e2, 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.
Perspective评论
Observation of a quantized resistance state in the absence of an external magnetic field completes a trio of quantum Hall related effects. [Also see Report by Chang et al.<http://www.sciencemag.org/cgi/lookup?lookupType=volpage&vol=340&fp=167&view=short>]
Author: Seongshik Oh
View article...<http://www.sciencemag.org/content/340/6129/153.full?rss=1>
Feed: Science: Current Issue
Posted on: Friday, 12 April 2013 2:59 AM
Author: Cui-Zu Chang
Subject: [Report] Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator
An elusive effect emerges in thin films of a bismuth-antimony-telluride topological insulator doped with magnetic chromium. [Also see Perspective by Oh<http://www.sciencemag.org/cgi/lookup?lookupType=volpage&vol=340&fp=153&view=short>]
Authors: Cui-Zu Chang, Jinsong Zhang, Xiao Feng, Jie Shen, Zuocheng Zhang, Minghua Guo, Kang Li, Yunbo Ou, Pang Wei, Li-Li Wang, Zhong-Qing Ji, Yang Feng, Shuaihua Ji, Xi Chen, Jinfeng Jia, Xi Dai, Zhong Fang, Shou-Cheng Zhang, Ke He, Yayu Wang, Li Lu, Xu-Cun Ma, Qi-Kun Xue
View article...<http://www.sciencemag.org/content/340/6129/167.full?rss=1>
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