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MA: Fachverband Magnetismus

MA 12: Skyrmions I

MA 12.2: Talk

Monday, March 18, 2024, 15:15–15:30, EB 301

3D Skyrmions in frustrated magnets — •Steven Schoenmaker, Ricardo Zarzuela, and Jairo Sinova — Johannes Gutenberg-University, Mainz, Germany

Three-dimensional magnetic solitons have received growing interest in the last few years driven by their intrinsic complexity and their potential use in topological computing and high-density memory storage. Noteworthy advancements have led to the experimental observation of hopfions [1] and skyrmion strings [2] in collinear magnets. Shankar skyrmions [3], the condensed matter realization of skyrmions present in baryonic matter and of which magnetic skyrmions are a two-dimensional analog, can emerge in spin systems described by a SO(3)-order parameter, such as frustrated magnets [4]. Motivated by this possibility, we discuss minimal phenomenological models for Shankar skyrmions in magnetically frustrated spintronic platforms, with an eye on their crystal phases.

[1] F. Zheng et al., Nature 623, 718-723 (2023).

[2] T. Yokouchi et al., Sci. Adv. 4, eaat1115 (2018); S. Seki et al., Nat. Comms. 11, 256 (2020).

[3] R. Shankar, J. Physique 38, 1405 (1977).

[4] R. Zarzuela, H. Ochoa and Y. Tserkovnyak, Phys. Rev. B 100, 054426 (2019).

Keywords: 3D Skyrmion; Frustrated magnets; Shankar Skyrmion; Non-collinear magnetism