We describe an electron filter that exploits the known transmission properties of quantum point contacts to allow local and tunable control of the spin polarization in a semiconductor. When properly configured, the conductance of this device gives a direct measure of the spin polarization of the carriers transmitted through it. These predictions are confirmed by numerical simulations, performed for a spin filter with realistic device parameters.
Journal: TechConnect Briefs
Volume: 1, Technical Proceedings of the 2001 International Conference on Modeling and Simulation of Microsystems
Published: March 19, 2001
Pages: 570 - 573
Industry sector: Sensors, MEMS, Electronics
Topics: Modeling & Simulation of Microsystems