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Emergent heavy fermion and superconductivity near Mott transition in twisted bilayer graphene
Ya-Hui Zhang
Near a bandwidth-tuned Mott transition, the Fermi velocity and quasiparticle residue of a metal often vanish. Here, we show that analogous phenomena emerge in twisted bil…
Quantum Mott semimetal in a one-dimensional Hubbard model
Boran Zhou, Taige Wang, Ya-Hui Zhang
Mott physics in topological bands has recently attracted considerable attention, particularly in the context of twisted bilayer graphene (TBG). However, the essential ingredients f…
Displacement-Field-Driven Semimetal-Superconductor Transition in Magic-Angle Twisted Trilayer Graphene
Bokai Liang, Jing-Yu Zhao, Ya-Hui Zhang
Magic-angle twisted trilayer graphene(MATTG) hosts versatile displacement-field-tuned correlated phenomena. MATTG consists of a dispersive Dirac cone which hybridizes with the flat…
Symmetric topological Mott insulator and Mott semimetal
Boran Zhou, Ya-Hui Zhang
Correlated physics in nearly flat topological bands is a central theme in the study of moiré materials. While ground states at integer fillings are typically identified as quantum…