Optically driven collective spin excitations and magnetization dynamics in the N\'eel-type skyrmion host GaV$_4$S$_8$

P. Padmanabhan; F. Sekiguchi; R. B. Versteeg; E. Slivina; V. Tsurkan; S. Bordács; I. Kézsmárki; P. H. M. van Loosdrecht

doi:10.1103/PhysRevLett.122.107203

Optically driven collective spin excitations and magnetization dynamics in the N\'eel-type skyrmion host GaV$_4$S$_8$

Strongly Correlated Electrons 2019-03-18 v1 Materials Science

Authors: P. Padmanabhan , F. Sekiguchi , R. B. Versteeg , E. Slivina , V. Tsurkan , S. Bordács , I. Kézsmárki , P. H. M. van Loosdrecht

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Abstract

GaV $_4$ S $_8$ is a multiferroic semiconductor hosting magnetic cycloid (Cyc) and N\'eel-type skyrmion lattice (SkL) phases with a broad region of thermal and magnetic stability. Here, we use time-resolved magneto-optical Kerr spectroscopy and micro-magnetic simulations to demonstrate the coherent generation of collective spin excitations in the Cyc and SkL phases driven by an optically-induced modulation of uniaxial anisotropy. Our results shed light on spin-dynamics in anisotropic materials hosting skyrmions and pave a new pathway for the optical control of their magnetic order.

Keywords

gav4s8 neel-type skyrmion collective spin excitation magneto-optical kerr spectroscopy micromagnetic simulation magnetization dynamics

Cite

@article{arxiv.1808.08476,
  title  = {Optically driven collective spin excitations and magnetization dynamics in the N\'eel-type skyrmion host GaV$_4$S$_8$},
  author = {P. Padmanabhan and F. Sekiguchi and R. B. Versteeg and E. Slivina and V. Tsurkan and S. Bordács and I. Kézsmárki and P. H. M. van Loosdrecht},
  journal= {arXiv preprint arXiv:1808.08476},
  year   = {2019}
}

Optically driven collective spin excitations and magnetization dynamics in the N\'eel-type skyrmion host GaV$_4$S$_8$

Abstract

Keywords

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