8 papers
Interlayer electric multipole Hall effect in twisted multilayers
Chengxin Xiao, Cong Xiao, Dawei Zhai +1
Electrons in layered van der Waals materials possess a layer pseudospin characterizing their wave-function distribution among layers. In twisted structures, this pseudospin forms n…
Propagating edge and interfacial states in corrugated graphene: Robustness and configurability
Adel Belayadi, Dawei Zhai, Nancy Sandler
Periodically strained graphene on patterned substrates provides a versatile route to realizing moiré-like electronic structures through strain engineering. Here, we show that the…
Fractional quantization by interaction of arbitrary strength in gapless flat bands with divergent quantum geometry
Wenqi Yang, Dawei Zhai, Wang Yao
Fractional quantum anomalous Hall (FQAH) effect, a lattice analogue of fractional quantum Hall effect, offers a unique pathway toward fault-tolerant quantum computation and deep in…
Fractional Chern insulator states in an isolated flat band of zero Chern number
Zuzhang Lin, Hongyu Lu, Wenqi Yang +2
A flat band with Chern number , and well isolated from the rest of Hilbert space by a gap much larger than interaction strength, is a context that has not been regarded as rel…
Twistronics and moiré superlattice physics in 2D transition metal dichalcogenides
Dawei Zhai, Hongyi Yu, Wang Yao
The moiré superlattices formed by stacking 2D semiconducting transition metal dichalcogenides (TMDs) with twisting angle or lattice mismatch have provided a versatile platform wit…
Layer Coherence Origin of Planar Hall Effect: from Charge to Multipole and Valley
Huiyuan Zheng, Dawei Zhai, Cong Xiao +1
We uncover a new origin of the planar Hall effect - as an intrinsic property of layer coherent electrons - that exists even in bilayer and trilayer atomically thin limit. It reform…