arXiv

Unidirectional Magnon-Driven Domain Wall Motion due to Interfacial Dzyaloshinskii-Moriya Interaction

Unidirectional Magnon-Driven Domain Wall Motion due to Interfacial Dzyaloshinskii-Moriya Interaction​
S.-W. Lee, K.-W. Kim, J.-H. Moon, G. Go, A. Manchon, H.-W. Lee, K. Everschor-Sitte, K.-J. Lee
2018/3/28
arXiv:1803.10776
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S.-W. Lee, K.-W. Kim, J.-H. Moon, G. Go, A. Manchon, H.-W. Lee, K. Everschor-Sitte, K.-J. Lee
.
arXiv
We theoretically study magnon-driven motion of a tranverse domain wall in the presence of interfacial Dzyaloshinskii-Moriya interaction (DMI). Contrary to previous studies, the domain wall moves along the same direction regardless of the magnon-flow direction. Our symmetry analysis reveals that the odd order DMI contributions to the domain wall velocity are independent of the magnon-flow direction. Corresponding DMI-induced asymmetric transitions from a spin-wave state to another give rise to a large momentum transfer to the domain wall without nonreciprocity and much reflection. This counterintuitive unidirectional motion occurs not only for a spin wave with a single wavevector but also for thermal magnons with distributed wavevectors.