Skyrmion lattice with a giant topological Hall effect in a frustrated triangular-lattice magnet
Abstract
Geometrically frustrated magnets provide abundant opportunities for discovering complex spin textures, which sometimes yield unconventional electromagnetic responses in correlated electron systems. It is theoretically predicted that magnetic frustration may also promote a topologically nontrivial spin state, i.e., magnetic skyrmions, which are nanometric spin vortices. Empirically, however, skyrmions are essentially concomitant with noncentrosymmetric lattice structures or interfacial-symmetry-breaking heterostructures. Here, we report the emergence of a Bloch-type skyrmion state in the frustrated centrosymmetric triangular-lattice magnet Gd2PdSi3. We identified the field-induced skyrmion phase via a giant topological Hall response, which is further corroborated by the observation of in-plane spin modulation probed by resonant x-ray scattering. Our results exemplify a new gold mine of magnetic frustration for producing topological spin textures endowed with emergent electrodynamics in centrosymmetric magnets.
Keywords
Cite
@article{arxiv.1805.10719,
title = {Skyrmion lattice with a giant topological Hall effect in a frustrated triangular-lattice magnet},
author = {Takashi Kurumaji and Taro Nakajima and Max Hirschberger and Akiko Kikkawa and Yuichi Yamasaki and Hajime Sagayama and Hironori Nakao and Yasujiro Taguchi and Taka-hisa Arima and Yoshinori Tokura},
journal= {arXiv preprint arXiv:1805.10719},
year = {2019}
}
Comments
23 pages, 3 figures