Spin separation in cyclotron motion
Abstract
The ability to manipulate spin of the charge carries in a controllable fashion is central to the rapidly developing field of spintronics, as well as for the development of a spin-based devices for quantum information processing. Electrical injection of spin-polarized currents is proven to be a formidable challenge. To date, spin polarized currents were generated by using either ferromagnetic materials as injectors or large spin splitting of electron energy levels in strong magnetic fields. Here we realized a solid-state analog of the Stern-Gerlach experiment in atomic physics, with spin-orbit interactions playing the role of the gradient of magnetic field. We achieved spatial separation of spins and bipolar spin filtering using cyclotron motion in a weak magnetic field.Keywords
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