6 papers
Magnetic Breakdown and Anomalous Quantum Oscillation in Rhombohedral Tetralayer Graphene
Jing-Yu Zhao, Yang-Zhi Chou, Sankar Das Sarma
We investigate magnetic breakdown near Van Hove singularities (VHSs) in the electron-doped rhombohedral tetralayer graphene, where chiral superconductivity has recently been report…
Minimal loop currents in doped Mott insulators
Can Cui, Jing-Yu Zhao, Zheng-Yu Weng
For the - model, variational wave functions can generally be constructed based on an accurate description of antiferromagnetism (AFM) at half-filling and an exact phase-strin…
Resonating-valence-bond superconductor from small Fermi surface in twisted bilayer graphene
Jing-Yu Zhao, Ya-Hui Zhang
Mechanism of superconductivity in twisted bilayer graphene (TBG) remains one of the central problems in correlated moiré materials. The most intriguing question is about the nature…
Integration of imprint-free and low coercivity ferroelectric BaTiO3 thin films on silicon
Jingtian Zhao, Beatriz Noheda, Martin F. Sarott
Highly-crystalline ferroelectric oxides integrated on Si hold great promise for energy-efficient memory and logic technologies. Exploiting epitaxial strain engineering in these mat…
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…