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Strain-induced magnetoresistance oscillations in GaAs-AlGaAs heterojunctions with ferromagnetic and superconducting submicrometer gratings

Ye, P. ; Weiss, Dieter ; Gerhardts, R. ; Klitzing, K. ; Eberl, K. ; Nickel, H. ; Toxon, C.



Abstract

We investigated the low-field magnetoresistance rho xx of a two- dimensional electron gas (2DEG) underneath ferromagnetic and superconducting metallic gratings. The strain due to the different thermal expansion coefficients of the metallic grating and the GaAs-AlGaAs heterojunctions results in a one-dimensional superlattice potential in the plane of the 2DEG. Depending on the aspect ratio ...

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