Ultrafast multi-level control of sub-50 nm skyrmions in a Pd-intercalated van der Waals magnet
Abstract
Achieving ultrafast, multi-level control of nanoscale skyrmions offers a transformative route for advancing van der Waals spintronics towards high-speed, scalable neuromorphic computing applications. However, progress has been impeded by the relatively large skyrmion size (~100 nm) in existing van der Waals magnets and the lack of efficient control strategies. Here, we simultaneously address both challenges by combining atomic intercalation with femtosecond laser manipulation. Through Pd atomic intercalation into the van der Waals magnet Fe3-δGaTe2, we realize magnetic field-stabilized skyrmions with an average diameter of ~43 nm at room temperature, the smallest skyrmions reported in the van der Waals magnets to date. Mechanism analysis reveals that this size reduction arises from enhanced Dzyaloshinskii-Moriya interaction and suppressed Heisenberg exchange coupling. On this tailored platform, we further demonstrate femtosecond laser-induced ultrafast generation of 43 nm skyrmions with an ultra-low energy consumption of 0.6 pJ per skyrmion. Most importantly, by tuning the laser pulse number, we achieve deterministic, multi-level modulation of skyrmion density, enabling skyrmion-based optical neuromorphic computing with a simulated training accuracy of ~91%.
Read the paper
Related studies
- In silico toxicology protocols
- QM7-X, a comprehensive dataset of quantum-mechanical properties spanning the chemical space of small organic molecules
- Quantum Informed Machine-Learning Potentials for Molecular Dynamics Simulations of CO2's Chemisorption and Diffusion in Mg-MOF-74
- In-silico strategies in nano-drug design: Bridging nanomaterials and pharmacological applications
- mRNA codon optimization with quantum computers
- The computational power of the human brain
Go deeper in Evidence Hub
Evidence Hub adds a study data sheet (design, sample size, evidence level, key numbers), an AI summary and a chat grounded in the paper's text.