Dynamics of Skyrmion Crystals in Metallic Thin Films

✍ Scribed by Zang, Jiadong; Mostovoy, Maxim; Han, Jung; Nagaosa, Naoto

• Book ID: 111947824
• Publisher: The American Physical Society
• Year: 2011
• Tongue: English
• Weight: 118 KB
• Volume: 107
• Category: Article
• ISSN: 0031-9007
• DOI: 10.1103/physrevlett.107.136804

✦ Synopsis

We study the collective dynamics of the Skyrmion crystal in thin films of ferromagnetic metals resulting from the nontrivial Skyrmion topology. It is shown that the current-driven motion of the crystal reduces the topological Hall effect and the Skyrmion trajectories bend away from the direction of the electric current (the Skyrmion Hall effect). We find a new dissipation mechanism in noncollinear spin textures that can lead to a much faster spin relaxation than Gilbert damping, calculate the dispersion of phonons in the Skyrmion crystal, and discuss the effects of impurity pinning of Skyrmions.