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Magneto-oscillations in a trapezoidal two-dimensional electron gas grown over GaAs wires

✍ Scribed by G.M. Gusev; N. La Scala Jr; D.I. Lubyshev; P.P. González-Borrero; M.A.P. da Silva; P. Basmaji; J.C. Rossi; J.C. Portal

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
81 KB
Volume
24
Category
Article
ISSN
0749-6036

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✦ Synopsis

In this work we investigate a nonplanar two-dimensional electron gas (2DEG) that allows study of the electronic behaviour in random and sign-alternating magnetic fields. Shubnikov-de Haas oscillations were studied by measuring the magnetoresistance at different angles φ between the field and the substrate. We find that at low magnetic field the position of the oscillation peaks follows B p ∼ B sin(φ -θ), where θ is the angle between the field and the facets that effectively contribute to magnetoresistance. This is due to the fact that electrons follow different paths depending on the realization of a specific magnetic field.

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