时间：2013年3月27日（周三）下午4点

地点：高等研究院，科学馆一楼104报告厅

报告人：王亚愚 教授（清华大学物理系）

报告题目：Experimental observation of the quantum anomalous Hall effect in topological insulators

报告摘要：

The anomalous Hall effect was discovered more than 130 years ago in ferromagnetic materials, in which a Hall resistance exists even in the

absence of external magnetic field. The quantized version of the anomalous Hall effect has attracted much interest since the discovery of

quantum Hall effect in the 1980s. A few years ago, it was proposed that quantum anomalous Hall effect may occur in magnetically doped

topological insulators, but the experimental realization has been elusive. In this talk we will report transport studies of topological insulator

thin films grown by molecular beam epitaxy. The main focus will be on the tuning of the electronic structure, magnetic ordering, and bulk band

topology, which led to the experimental realization of the quantum anomalous Hall effect, i.e., the quantum Hall effect in zero magnetic field.

Reference:

http://www.sciencemag.org/content/early/2013/03/13/science.1234414