Skyrmion Echo in a System of Interacting Skyrmions

Autor:	X.-G. Wang, Guang-hua Guo, A. Dyrdał, J. Barnaś, V. K. Dugaev, S. S. P. Parkin, A. Ernst, L. Chotorlishvili
Rok vydání:	2021
Předmět:	Condensed Matter - Strongly Correlated Electrons Strongly Correlated Electrons (cond-mat.str-el) General Physics and Astronomy FOS: Physical sciences
Zdroj:	Physical Review Letters
ISSN:	1079-7114
Popis:	We consider helical rotation of skyrmions confined in the potentials formed by nano-disks. Based on numerical and analytical calculations we propose the skyrmion echo phenomenon. The physical mechanism of the skyrmion echo formation is also proposed. Due to the distortion of the lattice, impurities, or pinning effect, confined skyrmions experience slightly different local fields, which leads to dephasing of the initial signal. The interaction between skyrmions also can contribute to the dephasing process. However, switching the magnetization direction in the nanodiscs (e.g. by spin transfer torque) also switches the helical rotation of the skyrmions from clockwise to anticlockwise (or vice-versa), and this restores the initial signal (which is the essence of skyrmion echo). 9 pages, 11 figures, accepted in Phys. Rev. Lett
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::17b2ebe87891c518c08accbc92ee65bf https://pubmed.ncbi.nlm.nih.gov/36179192 Zobrazit plný text záznamu