Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

HL: Halbleiterphysik

HL 16: Poster Ia

HL 16.12: Poster

Freitag, 4. März 2005, 16:30–19:00, Poster TU E

Mesoscopic spin filtering effect in the nonuniform spin-orbit interaction — •Jun-ichiro Ohe¹, Masayuki Yamamoto¹, Tomi Ohtsuki², Junsaku Nitta³, and Bernhard Kramer¹ — ¹Hamburg University — ²Sophia University, Japan — ³NTT Basic Research Lab. and CREST-JST, Japan

Novel spin filtering in two-dimensional electron systems with nonuniform spin-orbit interactions (SOI) is numerically investigated. The strength of SOI is modulated perpendicular to the charge current. A spatial gradient of effective magnetic field due to the nonuniform SOI causes the Stern-Gerlach type spin separation. The direction of the polarization is perpendicular to the current and parallel to the spatial gradient. Almost 100 % spin polarization can be realized even without any external magnetic field and ferromagnetic contacts. The spin polarization persists even in the presence of randomness.