Unidirectional Pumping of Phonons by Magnetization Dynamics
Unidirectional Pumping of Phonons by Magnetization Dynamics
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DOI：
10.1103/physrevlett.125.077203
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发表时间：
2020-08-14
影响因子：
8.6
通讯作者：
Yu, Tao
中科院分区：
文献类型：
--
作者：
Zhang, Xiang;Bauer, Gerrit E. W.;Yu, Tao
提出了一种基于磁致伸缩泵送表面声波的弱磁场表面声子输运控制方法。我们预测介电膜上纳米线的磁化动力学将角动量相反的saw注入相反的方向。两根平行的纳米线形成一个声子腔，在共振时将单向SAW电流泵入一半的衬底。
We propose a method to control surface phonon transport by weak magnetic fields based on the pumping of surface acoustic waves (SAWs) by magnetostriction. We predict that the magnetization dynamics of a nanowire on top of a dielectric films injects SAWs with opposite angular momenta into opposite directions. Two parallel nanowires form a phononic cavity that at magnetic resonances pump a unidirectional SAW current into half of the substrate.