Universität zu Köln

Schroeter, Sarah and Garst, Markus ORCID: 0000-0001-5390-3316 (2015). Scattering of high-energy magnons off a magnetic skyrmion. Low Temp. Phys., 41 (10). S. 817 - 826. MELVILLE: AMER INST PHYSICS. ISSN 1090-6517

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Abstract

We discuss the scattering of high-energy magnons off a single magnetic skyrmion within the field-polarized ground state of a two-dimensional chiral magnet. For wavevectors larger than the inverse skyrmion radius, kr(s) >> 1 the magnon scattering is dominated by an emerging magnetic field whose flux density is essentially determined by the topological charge density of the skyrmion texture. This leads to skew and rainbow scattering characterized by an asymmetric and oscillating differential cross section. We demonstrate that the transversal momentum transfer to the skyrmion is universal due to the quantization of the total emerging flux while the longitudinal momentum transfer is negligible in the high-energy limit. This results in a magnon-driven skyrmion motion approximately antiparallel to the incoming magnon current and a universal relation between current and skyrmion-velocity. (C) 2015 AIP Publishing LLC.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Schroeter, Sarah UNSPECIFIED UNSPECIFIED UNSPECIFIED Garst, Markus UNSPECIFIED orcid.org/0000-0001-5390-3316 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-390442
DOI:	10.1063/1.4932356
Journal or Publication Title:	Low Temp. Phys.
Volume:	41
Number:	10
Page Range:	S. 817 - 826
Date:	2015
Publisher:	AMER INST PHYSICS
Place of Publication:	MELVILLE
ISSN:	1090-6517
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CHIRAL MAGNETS; SPIN TRANSFER; MOTION; MODES; MNSI; WAVE; FERROMAGNETS; DYNAMICS; SOLITON; DENSITY Multiple languages Physics, Applied Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/39044