Universität zu Köln

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

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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
Creators:	Creators Email ORCID ORCID Put Code Sekiguchi, Fumiya UNSPECIFIED orcid.org/0000-0002-9063-9064 UNSPECIFIED Budzinauskas, Kestutis UNSPECIFIED UNSPECIFIED UNSPECIFIED Padmanabhan, Prashant UNSPECIFIED orcid.org/0000-0002-1881-5262 UNSPECIFIED Versteeg, Rolf B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tsurkan, Vladimir UNSPECIFIED UNSPECIFIED UNSPECIFIED Kezsmarki, Istvan UNSPECIFIED orcid.org/0000-0003-4706-3247 UNSPECIFIED Foggetti, Francesco UNSPECIFIED UNSPECIFIED UNSPECIFIED Artyukhin, Sergey UNSPECIFIED UNSPECIFIED UNSPECIFIED van Loosdrecht, Paul H. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
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
Uncontrolled Keywords:	Keywords Language LATTICE Multiple languages Multidisciplinary Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/68288