723 citations · 3k across the 43 of their papers we have counts for
5 papers · 2 filters
Type II model in superconducting nickelate NdSrNiO
Ya-Hui Zhang, Ashvin Vishwanath
The recent observation of superconductivity at relatively high temperatures in hole doped NdNiO has generated considerable interest, particularly due to its similarity with the…
Ferromagnetism in narrow bands of moiré superlattices
Cécile Repellin, Zhihuan Dong, Ya-Hui Zhang +1
Many graphene moiré superlattices host narrow bands with non-zero valley Chern numbers. We provide analytical and numerical evidence for a robust spin and/or valley polarized insul…
Spin Liquids and Pseudogap Metals in Hubbard Model in Moiré Superlattice
Ya-Hui Zhang, Dan Mao
Motivated by the realization of spin-valley Hubbard on triangular moiré superlattice in ABC trilayer graphene aligned with hexagon boron nitride (hBN) and possibly also in twisted…
Landau Level Degeneracy in Twisted Bilayer Graphene: Role of Symmetry Breaking
Ya-Hui Zhang, Hoi Chun Po, T. Senthil
The degeneracy of Landau levels flanking charge neutrality in twisted bilayer graphene is known to change from eight-fold to four-fold when the twist angle is reduced to values nea…
Twisted Bilayer Graphene Aligned with Hexagonal Boron Nitride: Anomalous Hall Effect and a Lattice Model
Ya-Hui Zhang, Dan Mao, T. Senthil
A recent experiment reported a large anomalous Hall effect in Magic Angle Twisted Bilayer Graphene (TBG) aligned with a hexagonal boron nitride(h-BN) substrate at fil…