5 papers
Fermionic Monte Carlo study of a realistic model of twisted bilayer graphene
Johannes S. Hofmann, Eslam Khalaf, Ashvin Vishwanath +2
The rich phenomenology of twisted bilayer graphene (TBG) near the magic angle is believed to arise from electron correlations in topological flat bands. An unbiased approach to thi…
Topological Correspondence between Hermitian and Non-Hermitian Systems: Anomalous Dynamics
Jong Yeon Lee, Junyeong Ahn, Hengyun Zhou +1
The hallmark of symmetry-protected topological (SPT) phases is the existence of anomalous boundary states, which can only be realized with the corresponding bulk system. In this wo…
Theory of correlated insulating behaviour and spin-triplet superconductivity in twisted double bilayer graphene
Jong Yeon Lee, Eslam Khalaf, Shang Liu +4
Two monolayers of graphene twisted by a small `magic' angle exhibit nearly flat bands leading to correlated electronic states and superconductivity, whose precise nature including…
Exceptional Surfaces in PT-Symmetric Photonic Systems
Hengyun Zhou, Jong Yeon Lee, Shang Liu +1
Exceptional points in non-Hermitian systems have recently been shown to possess nontrivial topological properties, and to give rise to many exotic physical phenomena. However, most…
Emergent Multi-flavor QED3 at the Plateau Transition between Fractional Chern Insulators: Applications to graphene heterostructures
Jong Yeon Lee, Chong Wang, Michael P. Zaletel +2
Recent experiments in graphene heterostructures have observed Chern insulators - integer and fractional Quantum Hall states made possible by a periodic substrate potential. Here we…