Kavli Affiliate: Mamoru Matsuo
| First 5 Authors: Takumi Funato, Mamoru Matsuo, Takeo Kato, ,
| Summary:
We consider spin injection driven by nonequilibrium chiral phonons from a
chiral insulator into an adjacent metal. Phonon-spin conversion arises from the
coupling of the electron spin with the microrotation associated with chiral
phonons. We derive a microscopic formula for the spin injection rate at a
metal-insulator interface. Our results clearly illustrate the microscopic
origin of spin current generation by chiral phonons and may lead to a
breakthrough in the development of spintronic devices without heavy elements.
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