Effects of mechanical rotation and vibration on spin currents

Matsuo, Mamoru; Ieda, Junichi   ; Maekawa, Sadamichi; Saito, Eiji

In the frontier of spintronics, much attention is paid on the control of spin currents. Due to the recent progress of nanoelectromechanics, mechanical manipulation of spins increases its importance. We discuss theoretically the generation of spin currents in both rotationally and linearly accelerating systems. The spin-orbit interaction argumented by inertial effects is derived from the low energy limit of the generally covariant Dirac equation. It is shown that the spin-orbit interaction is responsible for the generation of spin currents by mechanical rotation and vibration. We also investigate SU(2) U(1) gauge theory in accelerating systems, which allows us to extend the spintronic theory in inertial frame to non-inertial frames.