Breakdown of Shubnikov-de Haas oscillations in a short-period 1D lateral superlattice

R. A. Deutschmann, A. Lorke, W. Wegscheider, M. Bichler, G. Abstreiter

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Magnetic breakdown is observed in a two-dimensional electron system subject to a strong, atomically precise, one-dimensional potential with a period of 15 nm. The transition from closed to open electron orbits is studied in magneto-transport experiments by continuously changing the Fermi energy of the superlattice within and above the first miniband. Shubnikov-de Haas oscillations quench for Fermi energies close to the miniband gap but recover at higher magnetic fields. The density of states is clearly altered from a conventional 2D system which manifests itself in aperiodic magnetooscillations when sweeping the Fermi energy at fixed magnetic fields.

Original languageEnglish
Pages (from-to)561-564
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Issue number1
StatePublished - Feb 2000
Event13th International Conference on the Electronic Properties of Two-Dimensional Systems (EP2DS-13) - Ottawa, Ont, Can
Duration: 1 Aug 19996 Aug 1999


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