Intrinsic dipole Hall effect in twisted MoTe2: magnetoelectricity and contact-free signatures of topological transitions

FR Fan, C Xiao, W Yao - Nature Communications, 2024 - nature.com
We discover an intrinsic dipole Hall effect in a variety of magnetic insulating states at integer
fillings of twisted MoTe2 moiré superlattice, including topologically trivial and nontrivial ferro …

Chiral Pseudospin Liquids in Moiré Heterostructures

C Kuhlenkamp, W Kadow, A Imamoğlu, M Knap - Physical Review X, 2024 - APS
We propose multilayer moiré structures in strong external magnetic fields as a novel platform
for realizing highly tunable, frustrated Hubbard physics with topological order. Identifying the …

Interlayer electric multipoles induced by in-plane field from quantum geometric origins

H Zheng, D Zhai, C Xiao, W Yao - Nano Letters, 2024 - ACS Publications
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 in-plane field …

Dissipationless layertronics in axion insulator MnBi2Te4

S Li, M Gong, S Cheng, H Jiang… - National Science …, 2024 - academic.oup.com
Surface electrons in axion insulators are endowed with a topological layer degree of
freedom followed by exotic transport phenomena, eg, the layer Hall effect. Here, we propose …

Chirality probe of twisted bilayer graphene in the linear transport regime

DA Bahamon, G Gómez-Santos, DK Efetov… - Nano Letters, 2024 - ACS Publications
We propose minimal transport experiments in the coherent regime that can probe the
chirality of twisted moiré structures. We show that only with a third contact and in the …

Linear displacement current solely driven by the quantum metric

L Xiang, B Wang, Y Wei, Z Qiao, J Wang - Physical Review B, 2024 - APS
Quantum metric and Berry curvature are the real part and imaginary part of the quantum
geometric tensor, respectively. The T-odd (T, time-reversal) nonlinear Hall effect driven by …

Equivalence of semiclassical and response theories for second-order nonlinear ac Hall effects

J Jia, L Xiang, Z Qiao, J Wang - Physical Review B, 2024 - APS
It has been known that the semiclassical and the response theories can equivalently give
the Drude and the intrinsic anomalous Hall conductivities in the linear order of electric field …

Crossed nonlinear dynamical Hall effect in twisted bilayers

C Chen, D Zhai, C Xiao, W Yao - Physical Review Research, 2024 - APS
We propose a 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 out-of-plane ac …

Stable higher-order topological Dirac semimetals with monopole charge in alternating-twist multilayer graphene and beyond

S Qian, Y Li, CC Liu - Physical Review B, 2023 - APS
We demonstrate that a class of stable Z 2 monopole charge Dirac point (Z 2 DP) phases can
robustly exist in real materials, which is counterintuitive: that is, a Z 2 DP is unstable and …

Van Hove Singularity-Enhanced Raman Scattering and Photocurrent Generation in Twisted Monolayer–Bilayer Graphene

Z Wang, S Zhou, C Che, Q Liu, Z Zhu, S Qin, Q Tong… - ACS …, 2024 - ACS Publications
Twisted monolayer–bilayer graphene (TMBG) has recently emerged as an exciting platform
for exploring correlated physics and topological states with rich tunability. Strong light …