A Spin-Mechanical Device for Detection and Control of Spin Current by Nanomechanical Torque

摘要

We propose a spin-mechanical device to control and detect spin currents bymechanical torque. Our hybrid nano-electro-mechanical device, which contains ananowire with a ferromagnetic-nonmagnetic interface, is designed to measure orinduce spin polarized currents. Since spin carries angular momentum, a spinflip or spin transfer process involves a change in angular momentum--and hence,a torque--which enables mechanical measurement of spin flips. Conversely, anapplied torque can result in spin polarization and spin current.