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arXiv · 1911.06761

Chiral spin structure of electron gas in systems with magnetic skyrmions

L. A. Yung·K. S. Denisov·I. V. Rozhansky·N. S. Averkiev·E. Lahderanta
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Abstract

The theoretical study considers chiral spin texture induced in a 2D electron gas (2DEG) by magnetic skyrmions. We calculate the electron gas spin density as a linear response to the exchange interaction between the 2DEG and the magnetization field of a magnetic skyrmion. Two physically distinct regimes occur. When the size of the skyrmion is larger than the inverse Fermi wavevector $k_F^{-1}$, the spin density response follows the magnetization profile of the skyrmion. In the opposite case of a small skyrmion the emerging spin structure of 2DEG has a characteristic size of $k_F^{-1}$ and the response becomes non-local, it can be viewed as chiral Friedel oscillations. At that, the emerging spin structure of the oscillations appears to be more complex than that of the skyrmion itself.

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L. A. Yung, K. S. Denisov, I. V. Rozhansky, N. S. Averkiev, E. Lahderanta. 2019-11-15. Chiral spin structure of electron gas in systems with magnetic skyrmions. https://doi.org/10.1016/j.jmmm.2020.166755

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