Spin Currents in Magnetic Nanostructures

Detecting spin-polarized currents in ballistic nanostructures.

We demonstrate a mesoscopic spin polarizer/analyzer system that allows the spin polarization of current from a quantum point contact in a large in-plane magnetic field to be measured. A transverse electron focusing geometry is used to couple current from an emitter point contact into a collector point contact. At large in-plane fields, with the point contacts biased to transmit only a single sp...

Magnetization Manipulation in Nanostructures by Spin Currents

The program investigates the ultra-fast manipulation of the magnetization in nanostructures by spin currents, one of the forefront and most challenging areas in magnetism research. The research explores novel opportunities to manipulate the magnetization on the nanometer length scale and picosecond time scale, based on utilization of the strong, short range quantum mechanical exchange interacti...

Spin Relaxation in Magnetic Nanostructures

Spin Dependent Transport in Magnetic Nanostructures

Recent progress in physics on spin dependent transport in magnetic nanostructures is reviewed. Special attention is paid on the spin accumulation and spin current caused by spin injection into non-magnetic metals and semiconductors and superconductors. A variety of phenomena induced in nano-superconductor/ferromagnet devices are proposed, examining the spin-charge separation in superconductors.

Spin Currents in Semiconductor Nanostructures: a Nonequilibrium Green-function Approach

6 SO COUPLINGS IN LOW-DIMENSIONAL SEMICONDUCTORS 10 6.1 Rashba coupling in bulk 2DEG . . . . . . . . . . . . . . . . . . . . . . . . . . 13 6.2 Rashba coupling in quantum wires . . . . . . . . . . . . . . . . . . . . . . . . 15 6.2.1 Energy dispersion of Rashba spin-split transverse propagating subbands 15 6.2.2 Spin precession in Rashba quantum wires . . . . . . . . . . . . . . . . . 17 6.3 Di...