176 citations · 596 across the 25 of their papers we have counts for
7 papers · 1 filter
Contrasting twisted bilayer graphene and transition metal dichalcogenides for fractional Chern insulators: an emergent gauge picture
Heqiu Li, Ying Su, Yong Baek Kim +3
The recent experimental discovery of the zero-field fractional Chern insulator (FCI) in twisted moiré superlattices has sparked immense interest in this exotic to…
Massive Dirac fermions in moiré superlattices: a route towards topological flat minibands
Ying Su, Heqiu Li, Chuanwei Zhang +2
We demonstrate a generic mechanism to realize topological flat minibands by confining massive Dirac fermions in a periodic moiré potential, which can be achieved in a heterobilayer…
Classification of phase transitions and intertwined orders in crystallographic point groups
Heqiu Li
Symmetry provides important insight in understanding the nature of phase transitions. In the presence of crystalline symmetries, new phenomena in phase transition can emerge, such…
Spontaneous fractional Chern insulators in transition metal dichalcogenides Moire superlattices
Heqiu Li, Umesh Kumar, Kai Sun +1
Moir{é} superlattice realized in two-dimensional heterostructures offers an exciting platform to access strongly-correlated electronic states. In this work, we study transition met…
Topological insulators and higher-order topological insulators from gauge-invariant 1D lines
Heqiu Li, Kai Sun
In this manuscript, we study the interplay between symmetry and topology with a focus on the topological index of 2D/3D topological insulators and high-order topological insu…
Pfaffian formalism for higher-order topological insulators
Heqiu Li, Kai Sun
We generalize the Pfaffian formalism, which has been playing an important role in the study of time-reversal invariant topological insulators (TIs), to 3D chiral higher-order topol…
Topological Protection from Random Rashba Spin-Orbit Backscattering: Ballistic Transport in a Helical Luttinger Liquid
Hong-Yi Xie, Heqiu Li, Yang-Zhi Chou +1
The combination of Rashba spin-orbit coupling and potential disorder induces a random current operator for the edge states of a 2D topological insulator. We prove that charge trans…