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The Hall Effect

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Updated: Jan 4, 2026

Trapping of Micro Particles in Nanoplasmonic Optical Lattice

Trapping of Micro Particles in Nanoplasmonic Optical Lattice

Published on: September 5, 2017

Thermal Hall Effect Induced by Magnon-Phonon Interactions.

Xiaoou Zhang¹, Yinhan Zhang¹, Satoshi Okamoto²

¹Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.

Physical Review Letters

|November 9, 2019

Summary

A new mechanism for the thermal Hall effect in spin-wave systems is proposed, driven by magnon-phonon interactions. This effect is general when magnetic mirror symmetry is broken, offering insights into thermal conductivity.

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Area of Science:

Condensed Matter Physics
Quantum Materials
Spintronics

Background:

The thermal Hall effect (THE) is crucial for understanding heat transport in magnetic materials.
Investigating novel mechanisms for THE is essential for developing advanced thermal management and spintronic devices.
Magnon-phonon interactions are fundamental to energy transfer in magnetic systems.

Purpose of the Study:

To propose and demonstrate a new mechanism for the thermal Hall effect in exchange spin-wave systems.
To explore the role of magnon-phonon interactions in inducing thermal Hall conductivity.
To analyze the conditions under which this effect is general and its potential magnitude.

Main Methods:

Symmetry analysis to establish the generality of the thermal Hall effect mechanism.
Theoretical modeling in a collinear ferromagnet on a square lattice.
Investigation of systems with perpendicular easy-axis anisotropy and Dzyaloshinskii-Moriya interaction.
Analysis of magnon-phonon interactions and anticrossing points.

Main Results:

A new mechanism for the thermal Hall effect induced by magnon-phonon interaction is proposed.
The effect is shown to be general, existing when magnetic mirror symmetry is broken.
Thermal Hall conductivity is controlled by resonant contributions from magnon-phonon anticrossing points.

Conclusions:

Magnon-phonon interactions provide a viable mechanism for the thermal Hall effect in spin-wave systems.
The proposed mechanism is general and can be significant in materials with broken magnetic mirror symmetry.
The thermal Hall conductivity is comparable to magnon-mediated effects, highlighting its importance.