Tunneling and Nonhyperbolicity in Quantum Dots

Alessandro P. S. de Moura, Ying-Cheng Lai, Richard Akis, Jonathan P. Bird, David K. Ferry

Research output: Contribution to journalArticlepeer-review

64 Citations (Scopus)

Abstract

We argue that many major features in electronic transport in realistic quantum dots are not explainable by the usual semiclassical approach, due to the contributions of the quantum-mechanical tunneling of the electrons through the Kolmogorov-Arnol'd-Moser islands. We show that dynamical tunneling gives rise to a set of resonances characterized by two quantum numbers, which leads to conductance oscillations and concentration of wave functions near stable and unstable periodic orbits. Experimental results agree very well with our theoretical predictions, indicating that tunneling has to be taken into account to understand the physics of transport in generic nanostructures.

Original languageEnglish
Article number236804
Number of pages4
JournalPhysical Review Letters
Volume88
Issue number23
Early online date28 May 2002
DOIs
Publication statusPublished - 10 Jun 2002

Keywords

  • periodic conductance fluctuations
  • irregular scattering
  • ballistic cavities
  • stable orbits
  • point-contact
  • transport
  • chaos
  • quantization
  • billiards
  • stability

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