10 papers
Revisiting quadratic band crossing: from interaction-driven instability to intrinsic topology
Yadong Jiang, Linghao Huang, Zhaochen Liu +2
The realization of robust quantum anomalous Hall (QAH) phases at elevated temperatures remains a central challenge in condensed matter physics. While quadratic band crossing points…
A -valley Moiré Platform for Tunable Square Lattice Hubbard Model
Rui Shi, Kejie Bao, Huan Wang +1
Moiré superlattices have emerged as a premier platform for simulating the Hubbard model, yet achieving high tunability in square-lattice systems remains a key challenge. We demons…
Moiré Ferroelectricity-Driven Band Engineering in Twisted Square Bilayers
Kejie Bao, Rui Shi, Huan Wang +2
We develop the moiré band theory for M-valley twisted square homobilayers with layer groups - and -, and propose candidate material realizations. We show that moir…
Orbital Description of Landau Levels
Huan Wang, Rui Shi, Zhaochen Liu +1
The pursuit of a lattice analogue for Landau levels has been a central theme in condensed matter physics. Although the correspondence between Chern bands and the lowest Landau leve…
Flat Chern bands and correlated states in spiral magnet ReAgCl
Kejie Bao, Rui Shi, Huan Wang +2
We predict the van der Waals monolayer ReAgCl hosts isolated flat Chern bands at the Fermi level in its antiferromagnetic ground state. Their flatness and nontr…
FeTaX2: A ferrimagnetic quantum anomalous Hall insulator
Yadong Jiang, Huan Wang, Jing Wang
We propose that the van der Waals layered ternary transition metal chalcogenides FeTa ( S, Se, Te) as a new family of ferrimagnetic quantum anomalous Hall insulators with…