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Effect of edge transmission and elastic scattering on the resistance of magnetic barriers: Experiment and theory

: Cerchez, M.; Hugger, S.; Heinzel, T.; Schulz, N.


Physical Review. B 75 (2007), No.3
ISSN: 0163-1829
ISSN: 1098-0121
ISSN: 0556-2805
Journal Article
Fraunhofer IAF ()

Strong magnetic barriers are defined in two-dimensional electron gases by magnetizing dysprosium ferromagnetic platelets on top of a Ga[Al]As heterostructure. A small resistance across the barrier is observed even deep inside the closed regime. We have used semiclassical simulations to explain this behavior quantitatively in terms of a combined effect of elastic electron scattering inside the barrier region and ExB drift at the intersection of the magnetic barrier with the edge of the Hall bar.