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Two-dimensional (2D) hexagonal materials provide a promising platform for valleytronics devices, owing to the convenient generation and manipulation of valley qubits. However, efficient generation of valley information carriers with long valley lifetime is difficult to achieve in single material due to intrinsic valley relaxation channels. Here we show that, such intrinsic limit can be overcome through combining two materials into a van der Waals heterostructure; and report both near-perfect generation efficiency of valley information carriers, as well as record-high valley lifetime. Furthermore, we demonstrate generation, transport, and spatial-temporal imaging of the valley currents in a single device, which opens up new exciting opportunities to realize novel spintronic and valleytronic applications.
EDUCATION:
B. S. in Physics: Peking University, Beijing, China 2008.09 ~ 2012.06
Ph.D. in Physics: University of California at Berkeley 2012.08 ~ 2017.05
HONORS AND AWARDS：
Leo KoGuan Scholarship 2010
National Scholarship: twice 2009, 2011
Outstanding Graduates of Beijing 2012
Lars Commins Memorial Award in Experimental Physics 2017
RESEARCH EXPERIENCE：
Research Assistant 2013.01 ~ 2018.6
University of California at Berkeley Adviser: Feng Wang