Browsing by Author "Li, Xin"
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Item Perfect Valley Filter in a Topological Domain Wall(Amer Physical Soc, 2015-07-07) Pan, Hui; Li, Xin; Zhang, Fan; Yang, Shengyuan A.; Zhang, FanWe propose a realization of perfect valley filters based on the chiral domain-wall channels between a quantum anomalous Hall insulator and a quantum valley Hall insulator. Uniquely, all these channels reside in the same valley and propagate unidirectionally, 100% valley-polarizing passing-by carriers without backscattering. The valley index, the chirality, and the number of the channels are protected by topological charges, controllable by external fields, and detectable by circular dichroism.Item Three Essays in Economics: Competition, Coordination, and Health(2017-08) Roby, Christopher; Li, XinThis dissertation focuses on how changes in an economic environment can affect an individual's decision making. I assess how individuals respond to different rules and regulations which are meant to alter behavior and the implications therein. I address this problem by looking at response to information that affects competitive choices, group coordination in the face of losses, and risky behaviors for teenagers in response to a legal barrier for smoking.