Mi-Young Im
Center for X-ray Optics, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
Skyrmions are spatially localized quasiparticle-like topological structures that offer intriguing physics and spin phenomena with their non-trivial topological properties and their purported efficient coupling to electrical currents. Their nanoscale size, superior stability, energy efficient operation in CMOS-compatible metallic thin films promise skyrmion-electronics toward next-generation novel memory, logic, and neuromorphic/reconfigurable computing applications [1].
In our works, we addressed several key scientific issues for comprehensive understanding fundamental physics and topological properties of magnetic skyrmions, and provided essential technological information for realizing skyrmion-based electronics. Controlling the creation, deletion, configuration, and movement of magnetic skyrmions was one of the focused studies. These topics are not only scientifically important, but also highly relevant for the technological applications of skyrmions.
Based on X-ray microscopy, we demonstrated that the controlled creation and deletion of magnetic skyrmions by charge, heat, spin torque in target locations of systems can be achieved [2]. We also resported the effecive control of the size and density of magnetic skyrmions [3]. In addition, manipulating transport of magnetic skyrmions through a desired path, a essential feature for their applications in memory, diode, and logic gate, was extensively studied [4,5].
References
[1] A. Fert, N. Reyren, V. Cros, Nat. Rev. Mat. 2, 17031 (2017).[2] Soong-Geun Je et al., Nano Lett. 21, 3, 1253-1259 (2021).
[3] Soong-Geun Je et al., ACS Nano, 14, 3, 3251 (2020).
[4] Dae-Han Jung et al., Phys. Rev. B 104, L060408 (2021).
[5] Hee-Sung Han et al., to be submitted (2022).