Quantum interference on electron wave spreading over a coupled dot

Nobuyuki Aoki, Daisuke Onishi, Yoshikazu Iwase, Kohji Ishibashi, Jonathan P. Bird, David K. Ferry, Yuichi Ochiai

Research output: Contribution to journalConference articlepeer-review

Abstract

The characteristics of the conductance fluctuations, observed in the low-temperature magnetoresistance of an open quantum-dot molecule formed from a pair of split-gate quantum dots, have been studied. The evolution of these fluctuations suggests a decrease in the typical area for coherent interference with decreasing the coupling strength between the two dot. We discuss this behavior in terms of a transition from multi- to single-dot interference as a function of the inter-dot coupling. Moreover, an existence of interference trajectories which were independent of the dot coupling was also found in our analysis.

Original languageEnglish (US)
Pages (from-to)89-90
Number of pages2
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume18
Issue number1-3
DOIs
StatePublished - May 1 2003
Event23rd International Conference on Low Temperature Physics - Hiroshima, Japan
Duration: Aug 20 2002Aug 27 2002

Keywords

  • Coupled dot
  • Low temperature
  • Magnetoconductance
  • Quantum interference
  • Quantum-dot molecule

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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