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Topology-Driven Magnetic Quantum Phase Transition in Topological Insulators

meijin 添加于 2013/3/29 14:17:41  2400次阅读 | 0次推荐 | 1个评论

The breaking of time reversal symmetry in topological insulators may create previously unknown quantum effects. We observeda magnetic quantum phase transition in Cr-doped Bi2(SexTe1-x)3 topological insulator films grown by means of molecular beam epitaxy. Across the critical point, a topological quantum phasetransition is revealed through both angle-resolved photoemission measurements and density functional theory calculations.We present strong evidence that the bulk band topology is the fundamental driving force for the magnetic quantum phase transition.The tunable topological and magnetic properties in this system are well suited for realizing the exotic topological quantumphenomena in magnetic topological insulators.

作 者:Jinsong Zhang1,*, Cui-Zu Chang1,2,*, Peizhe Tang1,*, Zuocheng Zhang1, Xiao Feng2, Kang Li2, Li-li Wang2, Xi Chen1, Chaoxing Liu3, Wenhui Duan1, Ke He2,†, Qi-Kun Xue1,2, Xucun Ma2, Yayu Wang1,†
期刊名称: Science
期卷页: 03/29/2013 第339卷 第6127期 1582~1586页
学科领域:数理科学 » 物理学 » 基础物理学
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原文链接:http://www.sciencemag.org/content/339/6127/1582.abstract
DOI: 10.1126/science.1230905
ISBN: 0036-8075
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相关报道: http://paper.sciencenet.cn/htmlpaper/201332914205560028565.shtm
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