Physical review. B./Physical review. B· 2026Q1
Thermomagnonic torques in insulating altermagnets
- 1citations
- Q1SCImago
- 2026year
Short summary
A new theory reveals anisotropic thermomagnonic torques in insulating altermagnets, driven by spin-splitter magnonic and entropic torques, which control magnetic texture responses to temperature gradients.
AI-generated from the title and abstract; the full text is not read.
Key points
- Identifies spin-splitter magnonic torques from sublattice-odd spin currents.
- Identifies anisotropic entropic torques dictated by crystal symmetry.
- These torques cause anisotropic magnetic-texture responses to temperature gradients.
- Predicts domain-wall precession and anisotropic skyrmion Hall response.
AI-generated from the title and abstract; the full text is not read.
Abstract
We develop a symmetry-controlled theory of anisotropic thermomagnonic torques in insulating altermagnets. We identify a spin-splitter magnonic torque linked to thermally generated, sublattice-odd spin currents and an anisotropic entropic torque dictated by crystal symmetry. These torques produce anisotropic magnetic-texture responses to temperature gradients. In particular, thermally generated spin currents induce domain-wall precession, which reduces domain-wall velocities for selected gradient directions. We also predict an anisotropic skyrmion Hall response, with symmetry-selected directions enabling fast skyrmion motion with strongly suppressed transverse deflection. Our results reveal experimentally testable symmetry fingerprints of insulating altermagnets and extend more broadly to anisotropic magnets with exchange-driven magnon spin splitting.
The authors' abstract, as published at the source. Physical review. B./Physical review. B, 2026 · DOI ↗
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Field: Atomic and Molecular Physics, and Optics
Atomic and Molecular Physics, and OpticsPhysics and Astronomy