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arXiv 2005.11863cond-mat.mes-hall
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自旋-声子相互作用的Skyrmion质量

Skyrmion Mass from Spin-Phonon Interaction

D. Capic, E. M. Chudnovsky, D. A. Garanin

摘要:

在铁磁薄膜磁弹耦合的玩具模型中,精确计算了自旋-声子相互作用引起的skyrmion的惯性质量。质量的尺度是磁弹性耦合强度的平方、薄膜厚度的平方和skyrmion横向尺寸的一次方。对于纳米skyrmions,它是在几个电子质量的棒球场,但在具有大磁致伸缩的材料中可能显着更大。这些发现有望代表真实材料中任何复杂的自旋-声子相互作用结构。在处理基于skyrmions的信息处理速度时,必须考虑到它们。

英文摘要:

Inertial mass of a skyrmion arising from spin-phonon interaction is computed exactly within a toy model of the magnetoelastic coupling in a ferromagnetic film. The mass scales as the square of the strength of the magnetoelastic coupling, as the square of the film thickness, and as the first power of the lateral size of the skyrmion. For nanometer skyrmions it is in the ballpark of a few electron masses but may be significantly greater in materials with large magnetostriction. These findings are expected to stand for any complex structure of spin-phonon interaction in real materials. They must be taken into account when addressing the speed of information processing based upon skyrmions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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