New Frontiers in Topological Quantum Matter

Topology plays a key role in describing quantum matter, which has been greatly explored in recent decades [for an introduction: Hasan & Kane, Rev. of Mod. Phys. 82, 3045 (2010)]. I present how tuning a topological insulator featuring a Dirac fermion can be used as a platform to realize emergent Weyl fermion and “fractional” Fermi surfaces; and can also lead to correlated magnetic, Chern, or many-body states. The kagome lattice, which features Dirac fermions, flat bands, and van Hove singularities, can serve as the platform to explore topology, strong correlation, exotic superconductivity and many-body density-wave phenomena as shown in a series of most recent works. These novel topological quantum matter harbor properties that may lead to the development of next-generation quantum devices.

Speaker: Zahid Hasan, Princeton University