140 citations · 560 across the 28 of their papers we have counts for
28 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 provides a versatile platform to realize moiré-like electronic structures. We show that the interplay between strain-induced pseudomagnetic field and…
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…
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 with…
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…
Topological Insulator in Twisted Transition Metal Dichalcogenide Heterotrilayers
Hao He, Zhao Gong, Qing-Jun Tong +3
The quantum spin Hall effect has been predicted in twisted homobilayer transition metal dichalcogenides (TMDs) owing to the layer-pseudospin magnetic field. Recently, experimental…
Fractional quantum anomalous Hall effect in a singular flat band
Wenqi Yang, Dawei Zhai, Tixuan Tan +3
In the search of fractional quantum anomalous Hall (FQAH) effect, the conventional wisdom is to start from a flat Chern band isolated from the rest of the Hilbert space by band gap…
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…
Supersymmetry dictated topology in periodic gauge fields and realization in strained and twisted 2D materials
Dawei Zhai, Zuzhang Lin, Wang Yao
Supersymmetry (SUSY) of Hamiltonian dictates double degeneracy between a pair of superpartners (SPs) transformed by supercharge, except at zero energy where modes remain unpaired i…
Dynamical Chiral Nernst Effect in Twisted Van der Waals Few Layers
Juncheng Li, Dawei Zhai, Cong Xiao +1
The Nernst effect is a fundamental thermoelectric conversion phenomenon that was deemed to be possible only in systems with magnetic field or magnetization. In this work, we propos…
Layer Hall counterflow as a model probe of magic-angle twisted bilayer graphene
Jihang Zhu, Dawei Zhai, Cong Xiao +1
The recent constructions of flat moiré minibands in specifically twisted multilayer graphene and twisted transition metal dichalcogenides (TMDs) have facilitated the observation of…
Interlayer electric multipoles induced by in-plane field from quantum geometric origins
Huiyuan Zheng, Dawei Zhai, Cong Xiao +1
We show that interlayer charge transfer in 2D materials can be driven by an in-plane electric field, giving rise to electrical multipole generation in linear and second order of in…
Crossed Nonlinear Dynamical Hall Effect in Twisted Bilayers
Cong Chen, Dawei Zhai, Cong Xiao +1
We propose a novel nonlinear dynamical Hall effect characteristic of layered materials with chiral symmetry, which is driven by the joint action of in-plane and time variation of o…
Single photon emitters with polarization and orbital angular momentum locking in monolayer semiconductors
Di Zhang, Sha Deng, Dawei Zhai +2
Excitons in monolayer transition metal dichalcogenide are endowed with intrinsic valley-orbit coupling between their center-of-mass motion and valley pseudospin. When trapped in a…
Topological flat bands in strained graphene: substrate engineering and optical control
Md Tareq Mahmud, Dawei Zhai, Nancy Sandler
The discovery of correlated phases in twisted moiré superlattices accelerated the search for low-dimensional materials with exotic properties. A promising approach uses engineered…
Local inversion-symmetry breaking in a bismuthate high- superconductor
S. Griffitt, M. Spaić, J. Joe +6
The doped perovskite BaBiO exhibits a maximum superconducting transition temperature () of 34 K and was the first high- oxide to be discovered, yet pivotal questions…
Time-Reversal Even Charge Hall Effect from Twisted Interface Coupling
Dawei Zhai, Cong Chen, Cong Xiao +1
Under time-reversal symmetry, a linear charge Hall response is usually deemed to be forbidden by the Onsager relation. In this work, we discover a scenario for realizing a time-rev…
Ultrafast control of moiré pseudo-electromagnetic field in homobilayer semiconductors
Dawei Zhai, Wang Yao
In long-wavelength moiré patterns of homobilayer semiconductors, the layer pseudospin of electrons is subject to a sizable Zeeman field that is spatially modulated from the interla…
Anomalous magneto-optical response and chiral interface of dipolar excitons at twisted valleys
Huiyuan Zheng, Dawei Zhai, Wang Yao
An anomalous magneto-optical spectrum is discovered for dipolar valley excitons in twisted double layer transition metal dichalcogenides (TMD), where in-plane magnetic field induce…
Twist versus heterostrain control of optical properties of moiré exciton minibands
Huiyuan Zheng, Dawei Zhai, Wang Yao
We investigate the optical properties of interlayer excitons in heterobilayer transition metal dichalcogenides where moiré pattern is introduced by heterostrain, in comparison with…
Layer pseudospin dynamics and genuine non-Abelian Berry phase in inhomogeneously strained moiré pattern
Dawei Zhai, Wang Yao
Periodicity of long wavelength moiré patterns is very often destroyed by the inhomogeneous strain introduced in fabrications of van der Waals layered structures. We present a frame…
Theory of tunable flux lattices in the homobilayer moiré of twisted and uniformly strained transition metal dichalcogenides
Dawei Zhai, Wang Yao
The spatial texture of internal degree of freedom of electrons has profound effects on the properties of materials. Such texture in real space can manifest as an emergent magnetic…
Electron dynamics in strained graphene
Dawei Zhai, Nancy Sandler
The paper presents a theoretical description of the effects of strain induced by out-of-plane deformations on charge distributions and transport on graphene. A review of a continuu…
Linking interlayer twist angle to geometrical parameters of self-assembled folded graphene structures
Johannes C. Rode, Dawei Zhai, Christopher Belke +4
Thin adhesive films can be removed from substrates, torn, and folded in distinct geometries under external driving forces. In two-dimensional materials, however, these processes ca…