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 Ο between the field and the sub
Commensurability oscillations in a stripe-shaped two-dimensional electron gas
β Scribed by M. Trindade dos Santos; G.M. Gusev; J.R. Leite; A.A. Bykov; N.T. Moshegov; V.M. Kudryashev; A.I. Toropov; Yu.V. Nastaushev
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 231 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0749-6036
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β¦ Synopsis
We have studied the commensurability oscillations for a nonplanar, two-dimensional electron gas which is confined to a surface spatially modulated both in the transverse and longitudinal directions. We show, numerically, that coupling the drift in both directions causes the motion to be chaotic. The channeling tori, responsible for conduction along the stripes, are destroyed and the averaged squared drift velocities decrease.
π SIMILAR VOLUMES
Quantum mechanical calculations of the magnetotransport coefficients of a modulated twodimensional electron gas in a perpendicular magnetic field are presented using the Kubo method. The model modulation potential used is such that the effect of the steepness of the potential and its strength on the
A theory is developed of the density of states (DOS) of the two-dimensional electron gas (2D EG) in semiconductor heterostructures, taking into account the effect of disorder caused by some random field existing in the sample. For a smooth random field, the calculation is carried out within its Gaus
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