Einstein-de Haas Nanorotor
Einstein-de Haas Nanorotor
复制标题
爱因斯坦-德哈斯纳米转子
DOI：
10.1103/physrevlett.128.017701
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发表时间：
2022
影响因子：
8.6
通讯作者：
M. Matsuo
中科院分区：
文献类型：
--
作者：
W. Izumida;R. Okuyama;K. Sato;T. Kato;M. Matsuo
我们提出了一种嵌入在两个铁磁电极之间的纳米级转子，该转子由自旋注入驱动。自旋-旋转耦合使该纳米转子在反平行磁化结构中，在铁磁电极之间的稳定电流下，连续地从注入的自旋中获得角动量。我们建立了这种角动量转移的量子理论，并通过求解主方程证明了从进动状态到休眠顶部状态的松弛过程对于纳米转子的有效驱动至关重要。我们的工作阐明了有效驱动纳米电机的一般策略。
We propose a nanoscale rotor embedded between two ferromagnetic electrodes that is driven by spin injection. The spin-rotation coupling allows this nanorotor to continuously receive angular momentum from an injected spin under steady current flow between ferromagnetic electrodes in an antiparallel magnetization configuration. We develop a quantum theory of this angular-momentum transfer and show that a relaxation process from a precession state into a sleeping top state is crucial for the efficient driving of the nanorotor by solving the master equation. Our work clarifies a general strategy for efficient driving of a nanorotor.