Saturation of phase breaking in an open ballistic quantum dot

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

doi:10.1103/PhysRevLett.82.4687

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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82 Scopus citations

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 τ_φ may show the T^-2/3 variation expected for a one-dimensional wire due to the electron-electron interaction.

Original language	English (US)
Pages (from-to)	4687-4690
Number of pages	4
Journal	Physical Review Letters
Volume	82
Issue number	23
DOIs	https://doi.org/10.1103/PhysRevLett.82.4687
State	Published - 1999

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.82.4687

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title = "Saturation of phase breaking in an open ballistic quantum dot",

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.",

author = "Pivin, {D. P.} and A. Andresen and Bird, {J. P.} and Ferry, {D. K.}",

note = "Funding Information: This work was supported by the Office of Naval Research. The authors express their appreciation to R. Akis and M. Khoury for helpful discussions.",

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AU - Andresen, A.

AU - Bird, J. P.

AU - Ferry, D. K.

N1 - Funding Information: This work was supported by the Office of Naval Research. The authors express their appreciation to R. Akis and M. Khoury for helpful discussions.

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AB - 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.

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Saturation of phase breaking in an open ballistic quantum dot

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