Spin-mechanical device for detection and control of spin current by nanomechanical torque

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Abstract
We propose a spin-mechanical device to control and detect spin currents by mechanical torque. Our hybrid nanoelectromechanical device, which contains a nanowire with a ferromagnetic-nonmagnetic interface, is designed to measure or induce spin-polarized currents. Since spin carries angular momentum, a spin-flip or spin-transfer process involves a change in angular momentum and hence, a torque, which enables mechanical measurement of spin flips. Conversely, an applied torque can result in spin polarization and spin current.
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