Saturation of phase breaking in an open ballistic quantum dot

D. P. Pivin, A. Andresen, J. P. Bird, D. K. Ferry

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Abstract

A variation in the saturated phase-breaking time in a ballistic quantum dot is found to occur as the size is varied. This variation differs from that observed earlier, in which a transition from quasi-two-dimensional to zero-dimensional behavior was thought to occur. Instead, these results suggest that the saturated phase-breaking rate is governed by a change in the total number of electrons within the dot. At higher temperatures, the phase breaking is governed by coupling to the quantum wire leads, and τφ may show the T-2/3 variation expected for a one-dimensional wire due to the electron-electron interaction.

Original languageEnglish (US)
Pages (from-to)4687-4690
Number of pages4
JournalPhysical Review Letters
Volume82
Issue number23
DOIs
StatePublished - Jan 1 1999

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Pivin, D. P., Andresen, A., Bird, J. P., & Ferry, D. K. (1999). Saturation of phase breaking in an open ballistic quantum dot. Physical Review Letters, 82(23), 4687-4690. https://doi.org/10.1103/PhysRevLett.82.4687