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The Diffusion of Passive Tracers in Laminar Shear Flow
Published on: May 1, 2018
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Localized dissipation in linear moiré heat transport
Guoqiang Xu1, Shuihua Yang2, Xue Zhou3
1School of Electronic Science & Engineering, Southeast University, Nanjing, China. guoqiang.xu@seu.edu.cn.
Nature Communications
|December 14, 2025
Summary
Researchers demonstrate moiré-induced thermal localization in a linear system by engineering diffusivity. This breakthrough enables moiré physics in static, momentum-free heat transport, paving the way for programmable control.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Thermal Transport
Background:
- Moiré superlattices are crucial for flat bands, enabling localization in quantum and topological systems.
- Previous methods relied on nonlinear interactions, posing challenges for diffusive systems like thermal conduction.
- Implementing moiré physics in a linear, momentum-free regime for thermal transport remained a significant hurdle.
Purpose of the Study:
- To demonstrate moiré-induced thermal localization in a linear system.
- To overcome the limitations of nonlinear interactions in diffusive transport phenomena.
- To establish a new paradigm for moiré physics in static, linear systems.
Main Methods:
- Engineered spatially varying diffusivity in a linearly coupled bilayer conductive system.
- Tuned twist angles to create commensurate and incommensurate moiré patterns.
- Analyzed the role of modulated wavevectors in controlling periodicity and local structure.
Main Results:
- Achieved moiré-induced thermal localization without relying on nonlinear interactions.
- Observed aperiodic thermal localization in incommensurate quasicrystals.
- Linked the transition threshold for localization to the emergent lattice constant.
Conclusions:
- Established a paradigm for implementing moiré physics in static, linear, and momentum-free diffusive systems.
- Showcased geometrically programmable non-equilibrium control in heat and mass transport.
- Opened new avenues for designing materials with tailored thermal properties using moiré patterns.
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