Title: Magnetoresistance of a two-dimensional electron gas in random magnetic fields
Abstract: We report measurements on transport in a two-dimensional electron gas (2DEG) subject to an inhomogeneous magnetic field. To achieve the inhomogeneous magnetic field we randomly distributed superconducting lead (Pb) grains on the surface of the samples. In magnetic fields below the critical field for lead, the externally applied magnetic flux is either expelled from or trapped in the lead grains, and thus gives rise to inhomogeneities in the overall flux density penetrating the 2DEG. This inhomogeneous magnetic field causes a characteristic magnetoresistance with either one or two peaks, and a pronounced hysteresis of the peak positions.
Publication Year: 1996
Publication Date: 1996-07-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 1
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