Event

When two van der Waals materials of slightly different orientations or lattice constants are overlaid, a long-wavelength moiré pattern emerges. In semiconductors or semimetals, the low-energy physics can be described by a periodic potential with the moiré period. These materials provide a highly tunable platform for design and exploration of the effects of strong correlation and band topology. In this talk, I will discuss recent transport and optical experiments on angle-aligned semiconducting transition metal dichalcogenide heterobilayers, which provide a physical realization of the Kane-Mele-Hubbard model. I will discuss the rich electronic phase diagram observed in AB-stacked MoTe2/WSe2 moiré bilayers, including the quantum spin Hall and the quantum anomalous Hall effects.