Binghai Yan - Nonlinear optical responses of Weyl semimetal materials

MPSD Seminar

  • Date: Nov 28, 2017
  • Time: 14:00 - 15:00
  • Speaker: Binghai Yan
  • Weizmann Institute of Science, Israel
  • Location: CFEL (Bldg. 99)
  • Room: Seminar Room III, EG.080
  • Host: Angel Rubio
In the band structure of a Weyl semimetal (WSM), the conduction and valence bands cross each linearly through Weyl points that are usually treated as “monopoles” of the Berry curvature. As a second-order response, WSMs were very recently demonstrated to show strong nonlinear optical effects including an exotic nonlinear Hall effect. This is caused by the non-equilibrium distribution of the Berry curvature, described as the “dipole” of the Berry curvature. In this talk, I will talk about our recent computational results on nonlinear response for representative WSM materials TaAs and MoTe2.
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