Dynamics of Skyrmion Crystals in Metallic Thin Films

Jiadong Zang, Maxim Mostovoy, Jung Hoon Han, and Naoto Nagaosa
Phys. Rev. Lett. 107, 136804 – Published 23 September 2011

Abstract

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.

  • Received 25 February 2011

DOI:https://doi.org/10.1103/PhysRevLett.107.136804

© 2011 American Physical Society

Authors & Affiliations

Jiadong Zang1,2,3,*, Maxim Mostovoy4, Jung Hoon Han5, and Naoto Nagaosa2,3,†

  • 1Department of Physics, Fudan University, Shanghai 200433, China
  • 2Department of Applied Physics, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
  • 3Cross-Correlated Materials Research Group (CMRG), and Correlated Electron Research Group (CERG), RIKEN-ASI, Wako, Saitama 351-0198, Japan
  • 4Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
  • 5Department of Physics, BK21 Physics Research Division, Sungkyunkwan University, Suwon 440-746, Korea

  • *jdzang@fudan.edu.cn
  • nagaosa@ap.t.u-tokyo.ac.jp

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Issue

Vol. 107, Iss. 13 — 23 September 2011

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