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  1. No Access

    Chapter and Conference Paper

    Investigations on a dilute magnetic semicondutor (Ga1−xMnxAs) by conventional TEM and EELS

    The Dilute Magnetic Semiconductor (DMS) Ga1−xMnxAs offers good prospects for the integration of ferromagnetic and semiconducting properties for use in future “spintronic” applications [1].

    M. Soda, U. Wurstbauer, M. Hirmer… in EMC 2008 14th European Microscopy Congress… (2008)

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    Chapter and Conference Paper

    Cyclotron Resonance of Composite Fermions

    The introduction of suitable fictitious entities occasionally permits to cast otherwise difficult strongly interacting many-body systems in a single particle form. We can then take the customary physical appro...

    I. V. Kukushkin, J. H. Smet, K. Von Klitzing… in Optical Properties of 2D Systems with Inte… (2003)

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    Chapter and Conference Paper

    Anisotropic state of two-dimensional electron gas in high Landau levels

    When several Landau levels of a high mobility two-dimensional electron system are occupied, transport measurements reveal evidence for intriguing new phenomena at low temperature. Near half filling in the N=2 and...

    M. P. Lilly, K. B. Cooper, J. P. Eisenstein… in Advances in Solid State Physics 40 (2000)

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    Chapter and Conference Paper

    Evidence for Ising Ferromagnetism and First-Order Phase Transitions in the Two-Dimensional Electron Gas

    The two-dimensional (2D) electron gas in the quantum Hall regime offers unique possibilities to study the impact of many-body correlations under well-controlled conditions. One of the fields to which quantum H...

    V. Piazza, V. Pellegrini, F. Beltram… in Statistical and Dynamical Aspects of Mesos… (2000)

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    Chapter and Conference Paper

    Nanolithography on semiconductor heterostructures by local oxidation with an atomic force microscope

    We demonstrate that tunable nanostructures in Ga[Al]As heterostructures can be patterned with an atomic force microscope (AFM). By application of suitable voltages to the conductive tip of the AFM, the sample ...

    T. Heinzel, R. Held, S. Lüscher, T. Vančura… in Advances in Solid State Physics 39 (1999)

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    Chapter and Conference Paper

    Atomically precise, coupled quantum dots fabricated by cleaved edge overgrowth

    Recent progress in the fabrication of quantum dots by molecular beam epitaxy along three directions in space is reviewed. The optical properties of different sample structures consisting of individual quantum ...

    W. Wegscheider, G. Schedelbeck, M. Bichler… in Advances in Solid State Physics 38 (1999)

  7. No Access

    Chapter and Conference Paper

    Single-Mode Stimulated Emission in a Quantum-Wire Laser Fabricated by Cleaved-Edge Overgrowth

    We have used the molecular beam growth technique, we call Cleaved Edge Overgrowth to fabricate highly efficient lasers, which operate in the ID quantum limit. The active region of our laser consists of quantum...

    L. Pfeiffer, W. Wegscheider, M. Dignam, A. Pinczuk… in Nanostructures and Quantum Effects (1994)