Department of Applied Physics, The University of Tokyo , 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
Nano Lett. 2014 Aug 13;14(8):4432-7. doi: 10.1021/nl501379k. Epub 2014 Jul 11.
We study by the micromagnetic simulations the skyrmion motion along the edge driven by the current transverse to it. We found that (i) the velocity is enhanced by the factor of ∼ 1/α (α: the Gilbert damping) with the maximum value determined only by the confining force from the edge, (ii) the inertia appear due to the confining potential with the coordinate perpendicular to the edge playing the role of the kinetic momentum, and (iii) the collision between the two skyrmions is almost elastic without causing any internal distortions.
我们通过微磁学模拟研究了横向电流驱动下的 skyrmion 沿着边缘的运动。我们发现：（i）速度通过因子 1/α（α：Gilbert 阻尼）增强，最大值仅由边缘的约束力决定；（ii）惯性由于约束势引起，与边缘垂直的坐标扮演着动量力的角色；（iii）两个 skyrmion 之间的碰撞几乎是弹性的，不会引起任何内部变形。
