Magnetic texture-induced thermal Hall effects

Magnetic excitations in ferromagnetic systems with a noncollinear ground state magnetization experience a fictitious magnetic field due to the equilibrium magnetic texture. Here, we investigate how such fictitious fields lead to thermal Hall effects in two-dimensional insulating magnets in which the...

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Bibliographic Details
Published inarXiv.org
Main Authors van Hoogdalem, Kevin A, Tserkovnyak, Yaroslav, Loss, Daniel
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 18.01.2013
Subjects
Domain walls
Ferromagnetism
Free energy
Ground state
Hypothetical particles
Magnetic fields
Magnetism
Magnets
Particle theory
Phase diagrams
Physics - Mesoscale and Nanoscale Physics
Spin-orbit interactions
Texture
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Summary:Magnetic excitations in ferromagnetic systems with a noncollinear ground state magnetization experience a fictitious magnetic field due to the equilibrium magnetic texture. Here, we investigate how such fictitious fields lead to thermal Hall effects in two-dimensional insulating magnets in which the magnetic texture is caused by spin-orbit interaction. Besides the well-known geometric texture contribution to the fictitious magnetic field in such systems, there exists also an equally important contribution due to the original spin-orbit term in the free energy. We consider the different possible ground states in the phase diagram of a two-dimensional ferromagnet with spin-orbit interaction: the spiral state and the skyrmion lattice, and find that thermal Hall effects can occur in certain domain walls as well as the skyrmion lattice.
ISSN:2331-8422
DOI:10.48550/arxiv.1208.1646