Quantum transport in single and multiple quantum dots

David K. Ferry, Jonathan P. Bird, Richard Akis, David P. Pivin, Kevin M. Connolly, Koji Ishibashi, Yoshinobu Aoyagi, Takuo Sugano, Yuichi Ochiai

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

Ballistic quantum dots have been used in a wide variety of studies ranging from single-electron charging to chaotic systems. However, in open, ballistic quantum dots, the behavior is significantly different. Here, we discuss (1) the observation of regular, periodic fluctuations arising from the existence of stable orbits, (2) the regular and chaotic behavior of coupled dots, and (3) the theory of such dots. The regular orbit properties of these dots are their most stable, generic property, and are clearly reflected in the magnetoresistance. These give rise to periodic fluctuations, which are the result of a very few, periodic orbits within the dot that give rise to scarred wave functions and harmonically related frequencies in the Fourier spectrum. The orbits arise from the role of regular trajectories in the oscillatory density of states and the crucial collimation effects of the quantum point contacts.

Original languageEnglish (US)
Pages (from-to)3944-3950
Number of pages7
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume36
Issue number6 SUPPL. B
DOIs
StatePublished - Jun 1997

Keywords

  • Device modeling
  • Device physics
  • Inhomogeneities
  • Quantum dots
  • Quantum transport
  • Random impurities

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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    Ferry, D. K., Bird, J. P., Akis, R., Pivin, D. P., Connolly, K. M., Ishibashi, K., Aoyagi, Y., Sugano, T., & Ochiai, Y. (1997). Quantum transport in single and multiple quantum dots. Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, 36(6 SUPPL. B), 3944-3950. https://doi.org/10.1143/jjap.36.3944