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HL: Fachverband Halbleiterphysik

HL 79: Poster: New Materials

HL 79.29: Poster

Donnerstag, 23. März 2017, 15:00–19:00, P2-OG3

Electron flow focusing with magnetic barriers in 2DEG — •Jan Steimann, Mihai Cerchez, and Thomas Heinzel — Heinrich Heine University Düsseldorf, Universitätsstr. 1, D-40225 Düsseldorf

Electrons in a 2DEG are forced to travel from source to drain through two parallel openings in a transversal potential wall, produced by local anodic oxidation. A magnetic barrier is positioned at the openings to control the electron flow. The magnetic barrier height can be tuned such that a number of electrons coming through one opening can be focused onto the second opening, leading to magnetoresistance fluctuations. Experimental results and simulations will be presented.