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arXiv · 1208.1646

Magnetic texture-induced thermal Hall effects

Kevin A. van Hoogdalem·Yaroslav Tserkovnyak·Daniel Loss
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Abstract

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.

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Kevin A. van Hoogdalem, Yaroslav Tserkovnyak, Daniel Loss. 2013-01-18. Magnetic texture-induced thermal Hall effects. https://doi.org/10.1103/physrevb.87.024402

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