Inertia and Chiral Edge Modes of a Skyrmion Magnetic Bubble
Inertia and Chiral Edge Modes of a Skyrmion Magnetic Bubble
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DOI：
10.1103/physrevlett.109.217201
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发表时间：
2012-11-20
影响因子：
8.6
通讯作者：
Tchernyshyov, Oleg
中科院分区：
文献类型：
--
作者：
Makhfudz, Imam;Krueger, Benjamin;Tchernyshyov, Oleg
薄膜铁磁体中涡旋的动力学类似于均匀磁场中带电无质量粒子的运动。类似的动态也适用于其他具有非零Skyrmion数的磁性纹理。然而，最近的数值模拟显示，Skyrmion的磁泡与这个模型有很大的偏差。我们证明了Skyrmion气泡具有惯性，并从薄膜铁磁体的标准理论推导出它的质量。除了质心运动外，其他低能量模式是气泡边缘以不同速度向相反方向传播的波。
The dynamics of a vortex in a thin-film ferromagnet resembles the motion of a charged massless particle in a uniform magnetic field. Similar dynamics is expected for other magnetic textures with a nonzero Skyrmion number. However, recent numerical simulations reveal that Skyrmion magnetic bubbles show significant deviations from this model. We show that a Skyrmion bubble possesses inertia and derive its mass from the standard theory of a thin-film ferromagnet. In addition to center-of-mass motion, other low energy modes are waves on the edge of the bubble traveling with different speeds in opposite directions.