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

doi:10.1016/S0167-9317(99)00159-8

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 journal › Conference article › peer-review

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 language	English (US)
Pages (from-to)	89-93
Number of pages	5
Journal	Microelectronic Engineering
Volume	47
Issue number	1
DOIs	https://doi.org/10.1016/S0167-9317(99)00159-8
State	Published - Jun 1999
Event	Proceedings of the 1998 4th International Symposium on New Phenomena in Mesoscopic Structures (NPMS'98) - Kauai, HI, USA Duration: Dec 7 1998 → Dec 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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10.1016/S0167-9317(99)00159-8

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title = "Weakly open quantum dots: magnetotransport spectroscopy and zero-field resistance peaks",

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.",

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

note = "Funding Information: work supported by the Office of Naval Research and Defense Advanced Research Projects Agency; Proceedings of the 1998 4th International Symposium on New Phenomena in Mesoscopic Structures (NPMS'98) ; Conference date: 07-12-1998 Through 11-12-1998",

year = "1999",

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AU - Pivin, D. P.

AU - Akis, R.

AU - Andresen, A.

AU - Bird, J. P.

AU - Vasileska, Dragica

AU - Ferry, D. K.

N1 - Funding Information: work supported by the Office of Naval Research and Defense Advanced Research Projects Agency

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Y1 - 1999/6

N2 - 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.

AB - 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.

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JF - Microelectronic Engineering

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Y2 - 7 December 1998 through 11 December 1998

ER -

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

Abstract

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