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Interlayer Electric Multipole Hall Effect in Twisted Multilayers
Chengxin Xiao1,2,3, Cong Xiao4,5, Dawei Zhai1,3,6
1New Cornerstone Science Laboratory, Department of Physics, The University of Hong Kong, Hong Kong999077, China.
Nano Letters
|July 27, 2026
Summary
Layer pseudospin in twisted van der Waals materials creates unique layer Hall effects. Multilayer structures exhibit complex multipole Hall effects and in-plane magnetic multipoles, even without periodicity.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanoscience
Background:
- Electrons in layered van der Waals materials possess a layer pseudospin.
- Twisted structures exhibit nontrivial pseudospin textures, leading to phenomena like the layer Hall effect (LHE).
- Chiral bilayers show interlayer electric dipole Hall effects and in-plane magnetic dipoles.
Purpose of the Study:
- Investigate the layer Hall effect in multilayer twisted van der Waals materials.
- Explore interlayer electric multipole Hall effects and in-plane magnetic multipoles.
- Analyze the interlayer electric quadrupole Hall effect in twisted trilayers.
Main Methods:
- Theoretical investigation of electron behavior in twisted van der Waals multilayers.
- Analysis of layer pseudospin textures and their influence on Hall currents.
- Decomposition of Hall currents in large-angle twisted multilayers.
Main Results:
- Multilayer structures exhibit richer layer-dependent Hall currents, generating electric multipole Hall effects and magnetic multipoles.
- The interlayer electric quadrupole Hall effect is explored in mirror-symmetric twisted trilayers.
- Interlayer translation tunes Hall current magnitudes at small twist angles.
- Hall currents in large-angle twisted multilayers can be decomposed into contributions from individual interfaces.
Conclusions:
- The study reveals complex layer-dependent Hall currents and multipole effects in twisted van der Waals multilayers.
- A decomposition method allows for the analysis of layer-resolved Hall currents in large-angle twisted systems, even without periodicity.
- Findings advance the understanding of electron behavior and emergent phenomena in twisted layered materials.
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