6 papers
Anti-topological crystal and non-Abelian liquid in twisted semiconductor bilayers
Aidan P. Reddy, D. N. Sheng, Ahmed Abouelkomsan +2
We show that electron crystals compete closely with non-Abelian fractional Chern insulators in the half-filled second moiré band of twisted bilayer MoTe. Depending on the twis…
Instability of Nagaoka State and Quantum Phase Transition via Kinetic Frustration Control
Prakash Sharma, Yang Peng, Donna N. Sheng +2
We investigate the Nagaoka-Thouless (NT) ferromagnetic instability in the strongly interacting - Hubbard model by continuously breaking particle-hole symmetry on a tunable s…
Thermodynamic-Limit Evidence for Chiral Superconductivity Induced by Doping Chiral Topological Phases
Sen Niu, D. N. Sheng, Yang Peng
The emergence of superconductivity from doping strongly correlated chiral topological phases in purely repulsive two-dimensional fermionic systems is a problem of broad and fundame…
Quantum anomalous Hall effects and emergent Hall ferromagnets at fractional filling of helical trilayer graphene
Sen Niu, Jason Alicea, D. N. Sheng +1
Helical trilayer graphene realizes a versatile moiré system for exploring correlated topological states emerging from high Chern bands. Motivated by recent experimental observatio…
Robust non-Abelian even-denominator fractional Chern insulator in twisted bilayer MoTe
Feng Chen, Wei-Wei Luo, Wei Zhu +1
A recent experiment observes a series of quantum spin Hall effects in transition metal dichalcogenide moiré MoTe [K. Kang, et. al, Nature 628, 522-526 (2024)]. Among them, the…
Quantum phase diagram and non-abelian Moore-Read state in double twisted bilayer graphene
Sen Niu, Yang Peng, D. N. Sheng
Experimental realizations of Abelian fractional Chern insulators (FCIs) have demonstrated the potentials of moiré systems in synthesizing exotic quantum phases. Remarkably, twiste…