Einstein–de Haas Nanorotor

W. Izumida, R. Okuyama, K. Sato, T. Kato, M. Matsuo

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Article number017701
JournalPhysical Review Letters
Issue number1
Publication statusPublished - 7 Jan 2022


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