1 citations · 2 across the 10 of their papers we have counts for
10 papers
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…
Resonating-valence-bond superconductor from small Fermi surface in twisted bilayer graphene
Jing-Yu Zhao, Ya-Hui Zhang
Understanding the mechanism of superconductivity in twisted bilayer graphene (TBG) is a central challenge in correlated moiré materials. The most intriguing question is about the n…
Mixed valence Mott insulator and composite excitation in twisted bilayer graphene
Jing-Yu Zhao, Boran Zhou, Ya-Hui Zhang
Interplay of strong correlation and flat topological band has been a central problem in moiré systems such as the magic angle twisted bilayer graphene (TBG). Recent studies show th…
Ancilla theory of twisted bilayer graphene I: topological Mott localization and pseudogap metal in twisted bilayer graphene
Jing-Yu Zhao, Boran Zhou, Ya-Hui Zhang
The recent experimental studies of twisted bilayer graphene (TBG) raise a fundamental question: how do we understand Mott localization in a topological band? In this work, we offer…
New classes of quantum anomalous Hall crystals in multilayer graphene
Boran Zhou, Ya-Hui Zhang
The recent experimental observation of quantum anomalous Hall (QAH) effects in the rhombohedrally stacked pentalayer graphene has motivated theoretical discussions on the possibili…
Variational wavefunction for Mott insulator at finite using ancilla qubits
Boran Zhou, Hui-Ke Jin, Ya-Hui Zhang
The Mott regime with finite offers a promising platform for exploring novel phases of matter, such as quantum spin liquids (QSL) that exhibit fractionalization and emergent gau…
Type II t-J model in charge transfer regime in bilayer LaNiO and trilayer LaNiO
Hanbit Oh, Boran Zhou, Ya-Hui Zhang
Recent observations of an 80 K superconductor in LaNiO under high pressure have attracted significant attention. Recent experiments indicate that LaNiO may…