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Träfflista för sökning "WFRF:(See A. M.) srt2:(2010-2014)"

Sökning: WFRF:(See A. M.) > (2010-2014)

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1.
  • Scannell, B. C., et al. (författare)
  • Probing the sensitivity of electron wave interference to disorder-induced scattering in solid-state devices
  • 2012
  • Ingår i: Physical Review B (Condensed Matter and Materials Physics). - 1098-0121. ; 85:19
  • Tidskriftsartikel (refereegranskat)abstract
    • The study of electron motion in semiconductor billiards has elucidated our understanding of quantum interference and quantum chaos. The central assumption is that ionized donors generate only minor perturbations to the electron trajectories, which are determined by scattering from billiard walls. We use magnetoconductance fluctuations as a probe of the quantum interference and show that these fluctuations change radically when the scattering landscape is modified by thermally induced charge displacement between donor sites. Our results challenge the accepted understanding of quantum interference effects in nanostructures.
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2.
  • Micolich, A. P., et al. (författare)
  • Is it the boundaries or disorder that dominates electron transport in semiconductor `billiards'?
  • 2013
  • Ingår i: Fortschritte der Physik. - : Wiley. - 0015-8208. ; 61:2-3, s. 332-347
  • Forskningsöversikt (refereegranskat)abstract
    • Semiconductor billiards are often considered as ideal systems for studying dynamical chaos in the quantum mechanical limit. In the traditional picture, once the electron's mean free path, as determined by the mobility, becomes larger than the device, disorder is negligible and electron trajectories are shaped by specular reflection from the billiard walls alone. Experimental insight into the electron dynamics is normally obtained by magnetoconductance measurements. A number of recent experimental studies have shown these measurements to be largely independent of the billiard's exact shape, and highly dependent on sample-to-sample variations in disorder. In this paper, we discuss these more recent findings within the full historical context of work on semiconductor billiards, and offer strong evidence that small-angle scattering at the sub-100 nm length-scale dominates transport in these devices. This has important implications for the role these devices can play for experimental tests of ideas in quantum chaos. (C) 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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