• DOI:10.1103/PhysRevLett.110.207202
• Corpus ID: 12439642

Driven Skyrmions and dynamical transitions in chiral magnets.

@article{Lin2013DrivenSA,
  title={Driven Skyrmions and dynamical transitions in chiral magnets.},
  author={Shizeng Lin and C. J. O. Reichhardt and Cristian D. Batista and Avadh B Saxena},
  journal={Physical review letters},
  year={2013},
  volume={110 20},
  pages={
          207202
        }
}

• Shizeng Lin, C. Reichhardt, +1 author A. Saxena
• Published 25 January 2013
• Physics
• Physical review letters

We study the dynamics of Skyrmions in chiral magnets in the presence of a spin polarized current. The motion of Skyrmions in the ferromagnetic background excites spin waves and contributes to additional damping. At a large current, the spin wave spectrum becomes gapless and Skyrmions are created dynamically from the ferromagnetic state. At an even higher current, these Skyrmions are strongly deformed due to the damping and become unstable at a threshold current, leading to a chiral liquid. We show how Skyrmions can be created by increasing the current in the magnetic spiral state. We then construct a dynamic phase diagram for a chiral magnet with a current. The instability transitions between different states can be observed as experimentally clear signatures in the transport measurements, such as jumps and hysteresis.