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MA: Fachverband Magnetismus

MA 16: Skyrmions I

MA 16.2: Vortrag

Dienstag, 10. März 2026, 09:45–10:00, HSZ/0004

Topological pumping of skyrmionic textures in spiral multiferroics — •Luca Maranzana^1,2, Maxim Mostovoy³, Naoto Nagaosa^4,5, and Sergey Artyukhin¹ — ¹Quantum Materials Theory, Italian Institute of Technology, Via Morego 30, Genoa, Italy — ²Department of Physics, University of Genoa, Via Dodecaneso 33, Genoa, Italy — ³Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 3, 9747 AG Groningen, Netherlands — ⁴RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan — ⁵Fundamental Quantum Science Program, TRIP Headquarters, RIKEN, Wako 351-0198, Japan

Precise positioning of topological defects is crucial for racetrack memories, where their positions along a magnetic nanotrack encode information. Conventional approaches rely on engineered pinning landscapes, which increase power consumption. Here, we show that spiral multiferroics serve as a natural ruler for electric-field-driven positioning of skyrmionic textures, extending the concepts introduced in [1]. An oscillating electric field, assisted by anisotropy or a static magnetic field, displaces the topological defect by exactly one spiral period per full oscillation of the field. Such adiabatic pumping, reminiscent of Thouless pumping, is topologically protected and remains robust against small perturbations. Our work proposes a route to electrically driven, topologically protected transport of spin textures and positions spiral multiferroics as a natural platform for skyrmion racetracks.

[1] L. Maranzana, M. Mostovoy, N. Nagaosa, and S. Artyukhin, arXiv:2502.13083 (2025).

Keywords: Bimerons; Topological pumping; Multiferroics; Spiral magnets; Skyrmion racetracks