Dartmouth Events

Abstract: With the advancements in quantum materials research, the emergent quantum many-body phenomena, such as competing orders, topological order and fractionalization, can be realized in much more controllable ways. However, resolving them experimentally can be challenging.

In this talk, I will tell two stories of understanding the emergent phenomena in quantum materials. First, I will discuss our theory of the charge orders in recently extensively studied Vanadium based kagomé metals, which show a cascade of phase transitions as temperature lowers, from charge order, potential time reversal symmetry breaking order to superconductivity. The constraints on the theory space from various experiments will be elaborated. Next, motivated by the observation of continuous metal-insulator transition in the MoTe2/WSe2 moiré superlattices, I propose an exotic and well-motivated theory of metal-insulator transition with charge fractionalization. I will conclude with an outlook on further developing these ideas towards probing and controlling other exotic quantum many-body states.