Weakly open quantum dots: magnetotransport spectroscopy and zero-field resistance peaks

D. P. Pivin, R. Akis, A. Andresen, J. P. Bird, Dragica Vasileska, D. K. Ferry

Research output: Contribution to journalConference article

Abstract

The role of the environment on the observation of specific transport properties is discussed for open ballistic quantum dots. The saturation of phase-breaking at temperatures below 1 K is found to be mediated by lead coupling, which is found to affect the nature of the observed zero-field resistance peak. This can generally be attributed to the lead-induced modification of the available density of states in the dot, which is related to the magnetoconductance spectrum. Simulations of the magnetoconductance spectrum demonstrate that averaging the spectrum produces widely varying zero-field-resistance peaks in the same system. The exact nature of the environmental coupling in quantum dots is required to study the non-universal character of transport in these systems.

Original languageEnglish (US)
Pages (from-to)89-93
Number of pages5
JournalMicroelectronic Engineering
Volume47
Issue number1
DOIs
StatePublished - Jun 1999
EventProceedings of the 1998 4th International Symposium on New Phenomena in Mesoscopic Structures (NPMS'98) - Kauai, HI, USA
Duration: Dec 7 1998Dec 11 1998

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering

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