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HL: Fachverband Halbleiterphysik

HL 53: Poster II

HL 53.3: Poster

Wednesday, March 9, 2016, 09:30–13:30, Poster A

Commensurability effects of magnetic barriers in 2D electron gases — •Andreas Leuschner, Mihai Cerchez, and Thomas Heinzel — Heinrich Heine University Düsseldorf, Universitätsstr. 1 D-40225 Düsseldorf

Localized magnetic fields (magnetic barriers) in 2D electron gases lead to a magnetoresistance with a number of classical and quantum implications [1,2]. The simultaneous superposition of a variable homogeneous perpendicular magnetic field gives rise in addition to commensurability effects. These are explained in terms of the interplay between transverse snake orbit electrons, with variable cyclotron radii and the finite size of the sample.

[1] S. Hugger, M. Cerchez, H. Xu, and T. Heinzel, Phys. Rev. B 76, 195308 (2007) [2] B. Schüler, M. Cerchez, Hengyi Xu,, J. Schluck, T. Heinzel, and A. D. Wieck, Phys. Rev. B 90, 201111(R) (2014)