These so-called spin-polarized electrons typically flow through some part of the device, forming a spin-polarized current, or spin current, that is highly analogous to a polarized beam of light.

• 这些所谓自旋偏极化的电子通常会流经装置里的某个部份，形成自旋偏极化电流，简称自旋流，它和偏振光束非常类似。