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  • 1
    Electronic Resource
    Electronic Resource
    Conductance fluctuations and quantum chaotic scattering in semiconductor microstructures (1993)
    Woodbury, NY : American Institute of Physics (AIP)
    Chaos 3 (1993), S. 643-653 
    Details
    ISSN: 1089-7682
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We review recent experiments on aperiodic conductance fluctuations in ballistic GaAs/AlGaAs microstructures in the shape of a stadium billiard and a circle with point-contact leads, measured at millikelvin temperatures. Much of the observed behavior can be analyzed within a semiclassical approach to quantum chaotic scattering. After a brief review of the Landauer–Büttiker formulation of coherent transport, a variety of novel experimental phenomena and comparisons to semiclassical theory are presented. In particular, we discuss quantum-enhanced backscattering, the power spectrum of conductance fluctuations, crossover to the high-magnetic-field and tunneling regimes, and an application allowing the rate of phase-randomizing scattering to be measured in chaotic ballistic microstructures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.165927
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Controlled fabrication of metallic electrodes with atomic separation (1999)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 74 (1999), S. 2084-2086 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report a technique for fabricating metallic electrodes on insulating substrates with separations on the 1 nm scale. The fabrication technique, which combines lithographic and electrochemical methods, provides atomic resolution without requiring sophisticated instrumentation. The process is simple, controllable, reversible, and robust, allowing rapid fabrication of electrode pairs with high yield. We expect the method to prove useful in interfacing molecular-scale structures to macroscopic probes and electronic devices. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.123765
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    High bias transport and magnetometer design in open quantum dots (1998)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 72 (1998), S. 471-473 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report transport measurements as a function of bias in open semiconductor quantum dots. These measurements are well described by an effective electron temperature derived from Joule heating at the point contacts and cooling by Wiedemann-Franz out-diffusion of thermal electrons. Using this model, we propose and analyze a quantum dot based sensor capable of measuring absolute magnetic field at micron scales with a noise floor of ∼110 nT/Hz at 300 mK. Non optimized measurements reported here are ∼2 orders of magnitude above this floor. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.120789
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Triplet–singlet spin relaxation via nuclei in a double quantum dot (2005)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 435 (2005), S. 925-928 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The spin of a confined electron, when oriented originally in some direction, will lose memory of that orientation after some time. Physical mechanisms leading to this relaxation of spin memory typically involve either coupling of the electron spin to its orbital motion or to nuclear spins. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature03815
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