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It has been expected and reported that chiral anomaly in (3+1)D may be realized in condensed matter system. Dirac and Weyl semimetals are excellent candidates. One of the signatures of the chiral anomaly is a negative magnetoresistance in a transport measurement. The theories in the quantum limit (with strong magnetic field) and the semiclassical limit (with strong magnetic field) has been discussed by Nielsen and Ninomiya, and Son and Spivak respectively.However, the Weyl semimetals have topological surface states, "Fermi arcs". It has been pointed out by Haldane [arXiv.1401.0529] that the Fermi arcs are "wires'' in the reciprocal space connecting the Weyl cones. We derived a formula of anomalous current which has the same form in both the quantum and the semiclassical limit. The surface correction to the negative magnetoresistance due to the diffusive Fermi arcs has bee discussed. We found that, in the strong diffusion limit, the chiral anomaly is completely cancel out by the by the back flow through Fermi arcs. In the strong inter-valley scattering regime, it recovers the previous result reported in Son and Spivak. Whereas in the absence of the inter-valley scattering, we found that the negative magnetoresistance is dominated by the surface diffusion.
Education:
2015 – now PhD Candidate in Physics Princeton University
2013-2015 Master of Science in Physics, école Normale Supérieure (de Paris)
2013 Normalien (Selection Internationale)
2009-2013 Bachelor of Science in Physics Peking University
2006-2009 Baccalaureate / Diploma High School Affiliated to Fudan University
Awards and Honors:
1. National Physics Olympics (Shanghai region), first prize in 2008;
2. National Chemistry Olympics (Shanghai region), second prize, 2008;
3. National Olympiads in Informatics (Shanghai region), second prize, 2007;
4. National Undergraduate Physics Competition (Regional, Beijing), third prize, 2010;
5. National Undergraduate Mathematics Competition (Beijing), third prize, 2010;
6. Selected as a member of ‘Weiming Xueziban’ (Excellent Student Program), 2010;
7. “Excellent Individual of Volunteers of Peking University”, 2011;
8. Peking University Prize for Social Work, in 2010-2011 academic year;
9. Teaching Excellence Award, Princeton University, 2017.