Strongly Correlated Electrons Across the Moiré Universe

Speaker: 
Yves Kwan
Institution: 
Princeton University
Date: 
Thursday, February 27, 2025
Time: 
2:00 pm
Location: 
RH 142

Abstract: The observation of superconductivity and correlated insulators in magic-angle graphene has ushered in the new paradigm of moiré materials, where two-dimensional materials are stacked and rotated to generate a variety of intriguing phases of quantum matter. Such physics is enabled by the confluence of band structure engineering, strong interactions, and electronic topology. In this talk, I will first explain how the interplay of these ingredients leads to a unusual form of electronic ordering called the "Incommensurate Kekulé Spiral", which has now been experimentally established in twisted bilayer and trilayer graphene. I will then discuss theoretical progress in understanding the recently discovered fractional Chern insulators in twisted bilayer MoTe2 and rhombohedral graphene+hBN, highlighting the future exciting opportunities in this field.

Host: 
Luis Jauregui