Journal
PHYSICAL REVIEW B
Volume 72, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.72.115315
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Spin-dependent electron transport in a two-dimensional electron gas, periodically modulated by parallel ferromagnetic and Schottky metal stripes, is studied theoretically. Assuming ballistic transport, the spin-dependent transmission, conductance, and polarization are evaluated for a range of experimentally accessible parameters. The structures of these quantities for one ferromagnetic-Schottky stripe unit can be significantly enhanced with increasing the number of units and highly polarized transport can be achieved. This structure is rounded off but survives to a good extent for finite temperatures of a few degrees. Results are given for parallel as well as antiparallel magnetizations of the ferromagnetic stripes between two consecutive units. In the latter a high degree of spin selection results and the spin polarization can be controlled very efficiently with Schottky metal stripes.
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