Weyl Semimetal Materials: from Bulk to Surface

In a Weyl semimetal (WSM), the conduction and valence bands cross each linearly through Weyl points that can generate Weyl fermion excitations. Recently the WSM phase was discovered in several material systems (e.g. TaAs and MoTe₂) by detecting their unique surface Fermi arcs, as a new topological quantum state of matter. These WSM materials open a platform to test other fascinating phenomena of high-energy physics, like the chiral anomaly effect of Weyl fermions. In this talk, I will overview recent progress in surface states and bulk magneto-transport of Weyl materials, which fuses materials simulations, materials growth and the fundamental physics.  Further, I will talk about a remarkable nonlinear optical response of WSMs with our very recent theoretical results.