Impact of small-angle scattering on Ballistic transport in quantum dots

A. M. See; I. Pilgrim; null Scannell; R.D. Montgomery; A. M. Bruke; Martin Aagesen; Poul Erik Lindelof; I. Farrer; D.A. Ritchie; R.P. Taylor; A.R. Hamilton; A.P. Micolich

doi:10.1103/PhysRevLett.108.196807

Impact of small-angle scattering on Ballistic transport in quantum dots

A. M. See, I. Pilgrim, Scannell, R.D. Montgomery, A. M. Bruke, Martin Aagesen, Poul Erik Lindelof, I. Farrer, D.A. Ritchie, R.P. Taylor, A.R. Hamilton, A.P. Micolich

Condensed Matter Physics

25 Citations (Scopus)

Abstract

Disorder increasingly affects performance as electronic devices are reduced in size. The ionized dopants used to populate a device with electrons are particularly problematic, leading to unpredictable changes in the behavior of devices such as quantum dots each time they are cooled for use. We show that a quantum dot can be used as a highly sensitive probe of changes in disorder potential and that, by removing the ionized dopants and populating the dot electrostatically, its electronic properties become reproducible with high fidelity after thermal cycling to room temperature. Our work demonstrates that the disorder potential has a significant, perhaps even dominant, influence on the electron dynamics, with important implications for "ballistic" transport in quantum dots.

Original language	English
Journal	Physical Review Letters
Volume	108
Issue number	19
Pages (from-to)	196807
Number of pages	5
ISSN	0031-9007
DOIs	https://doi.org/10.1103/PhysRevLett.108.196807
Publication status	Published - 11 May 2012

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title = "Impact of small-angle scattering on Ballistic transport in quantum dots",

abstract = "Disorder increasingly affects performance as electronic devices are reduced in size. The ionized dopants used to populate a device with electrons are particularly problematic, leading to unpredictable changes in the behavior of devices such as quantum dots each time they are cooled for use. We show that a quantum dot can be used as a highly sensitive probe of changes in disorder potential and that, by removing the ionized dopants and populating the dot electrostatically, its electronic properties become reproducible with high fidelity after thermal cycling to room temperature. Our work demonstrates that the disorder potential has a significant, perhaps even dominant, influence on the electron dynamics, with important implications for {"}ballistic{"} transport in quantum dots.",

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language = "English",

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TY - JOUR

T1 - Impact of small-angle scattering on Ballistic transport in quantum dots

AU - See, A. M.

AU - Pilgrim, I.

AU - Scannell, null

AU - Montgomery, R.D.

AU - Bruke, A. M.

AU - Aagesen, Martin

AU - Lindelof, Poul Erik

AU - Farrer, I.

AU - Ritchie, D.A.

AU - Taylor, R.P.

AU - Hamilton, A.R.

AU - Micolich, A.P.

PY - 2012/5/11

Y1 - 2012/5/11

N2 - Disorder increasingly affects performance as electronic devices are reduced in size. The ionized dopants used to populate a device with electrons are particularly problematic, leading to unpredictable changes in the behavior of devices such as quantum dots each time they are cooled for use. We show that a quantum dot can be used as a highly sensitive probe of changes in disorder potential and that, by removing the ionized dopants and populating the dot electrostatically, its electronic properties become reproducible with high fidelity after thermal cycling to room temperature. Our work demonstrates that the disorder potential has a significant, perhaps even dominant, influence on the electron dynamics, with important implications for "ballistic" transport in quantum dots.

AB - Disorder increasingly affects performance as electronic devices are reduced in size. The ionized dopants used to populate a device with electrons are particularly problematic, leading to unpredictable changes in the behavior of devices such as quantum dots each time they are cooled for use. We show that a quantum dot can be used as a highly sensitive probe of changes in disorder potential and that, by removing the ionized dopants and populating the dot electrostatically, its electronic properties become reproducible with high fidelity after thermal cycling to room temperature. Our work demonstrates that the disorder potential has a significant, perhaps even dominant, influence on the electron dynamics, with important implications for "ballistic" transport in quantum dots.

U2 - 10.1103/PhysRevLett.108.196807

DO - 10.1103/PhysRevLett.108.196807

M3 - Journal article

C2 - 23003076

SN - 0031-9007

VL - 108

SP - 196807

JO - Physical Review Letters

JF - Physical Review Letters

IS - 19

ER -

Impact of small-angle scattering on Ballistic transport in quantum dots

Abstract

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