A1 Journal article (refereed), original research

Chiral spin structure of electron gas in systems with magnetic skyrmions


Publication Details
Authors: Yung L.A., Denisov K.S., Rozhansky I.V., Averkiev N.S., Lähderanta E.
Publisher: Elsevier
Publication year: 2020
Language: English
Related Journal or Series Information: Journal of Magnetism and Magnetic Materials
Volume number: 506
ISSN: 0304-8853
eISSN: 1873-4766
JUFO-Level of this publication: 1
Open Access: Not an Open Access publication

Abstract

The theoretical study considers chiral spin textures 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 kF-1" role="presentation" style="display: inline-block; line-height: normal; font-size: 16.2px; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border-width: 0px; border-style: initial; position: relative;">kF-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 kF-1" role="presentation" style="display: inline-block; line-height: normal; font-size: 16.2px; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border-width: 0px; border-style: initial; position: relative;">kF-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.


Last updated on 2020-04-05 at 13:08