Skyrmion Echo in a system of interacting Skyrmions

Abstract

We consider helical rotation of skyrmions confined in the potentials formed by nano-disks. Based on numerical and analytical calculations we propose the skyrmion echo phenomenon. The physical mechanism of the skyrmion echo formation is also proposed. Due to the distortion of the lattice, impurities, or pinning effect, confined skyrmions experience slightly different local fields, which leads to dephasing of the initial signal. The interaction between skyrmions also can contribute to the dephasing process. However, switching the magnetization direction in the nanodiscs (e.g. by spin transfer torque) also switches the helical rotation of the skyrmions from clockwise to anticlockwise (or vice-versa), and this restores the initial signal (which is the essence of skyrmion echo).

9 pages, 11 figures, accepted in Phys. Rev. Lett

References in corpus (5)

• Theory of current-driven motion of Skyrmions and spirals in helical magnets
• Electric field-induced Skyrmion distortion and giant lattice rotation in the magnetoelectric insulator Cu2OSeO3
• Skyrmionic spin Seebeck effect via dissipative thermomagnonic torques
• Gauged Baby Skyrme Model with Chern-Simons term
• Thermally assisted Skyrmion drag in a nonuniform electric field

Cited by in corpus (5)

• Optical-controlled ultrafast dynamics of skyrmion in antiferromagnets
• Prethermal Floquet time crystals in chiral multiferroic chains and applications as quantum sensors of AC fields
• Steering skyrmions with microwave and THz electric pulses
• Topological charge and spin Hall effects due to skyrmions in canted antiferromagnets
• Topological transport of vorticity on curved magnetic membranes