Sekiguchi, Fumiya ORCID: 0000-0002-9063-9064, Budzinauskas, Kestutis, Padmanabhan, Prashant
ORCID: 0000-0002-1881-5262, Versteeg, Rolf B., Tsurkan, Vladimir, Kezsmarki, Istvan
ORCID: 0000-0003-4706-3247, Foggetti, Francesco, Artyukhin, Sergey and van Loosdrecht, Paul H. M.
(2022).
Slowdown of photoexcited spin dynamics in the non-collinear spin-ordered phases in skyrmion host GaV4S8.
Nat. Commun., 13 (1).
BERLIN:
NATURE PORTFOLIO.
ISSN 2041-1723
Abstract
Formation of magnetic order alters the character of spin excitations, which then affects transport properties. We investigate the photoexcited ultrafast spin dynamics in different magnetic phases in Neel-type skyrmion host GaV4S8 with time-resolved magneto-optical Kerr effect experiments. The coherent spin precession, whose amplitude is enhanced in the skyrmion-lattice phase, shows a signature of phase coexistence across the magnetic phase transitions. The incoherent spin relaxation dynamics slows down by a factor of two in the skyrmion-lattice/cycloid phases, indicating significant decrease in thermal conductivity triggered by a small change of magnetic field. The slow heat diffusion in the skyrmion-lattice/cycloid phases is attributed to the stronger magnon scattering off the domain walls formed in abundance in the skyrmion-lattice/cycloid phase. These results highlight the impact of spatial spin structure on the ultrafast heat transport in spin systems, providing a useful insight for the step toward ultrafast photocontrol of the magnets with novel spin orders. Skyrmions are a topological magnetic texture that have garnered considerable interest for various technological applications. Here, Sekiguchi et al. investigate the ultrafast optical response of GaV4S6, and find a significant reduction in the thermal conductivity in the skyrmion phase.
Item Type: | Journal Article | ||||||||||||||||||||||||||||||||||||||||
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URN: | urn:nbn:de:hbz:38-682880 | ||||||||||||||||||||||||||||||||||||||||
DOI: | 10.1038/s41467-022-30829-z | ||||||||||||||||||||||||||||||||||||||||
Journal or Publication Title: | Nat. Commun. | ||||||||||||||||||||||||||||||||||||||||
Volume: | 13 | ||||||||||||||||||||||||||||||||||||||||
Number: | 1 | ||||||||||||||||||||||||||||||||||||||||
Date: | 2022 | ||||||||||||||||||||||||||||||||||||||||
Publisher: | NATURE PORTFOLIO | ||||||||||||||||||||||||||||||||||||||||
Place of Publication: | BERLIN | ||||||||||||||||||||||||||||||||||||||||
ISSN: | 2041-1723 | ||||||||||||||||||||||||||||||||||||||||
Language: | English | ||||||||||||||||||||||||||||||||||||||||
Faculty: | Unspecified | ||||||||||||||||||||||||||||||||||||||||
Divisions: | Unspecified | ||||||||||||||||||||||||||||||||||||||||
Subjects: | no entry | ||||||||||||||||||||||||||||||||||||||||
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URI: | http://kups.ub.uni-koeln.de/id/eprint/68288 |
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