Zero Field Magnetoresistance Peaks in Open Quantum Dots: Weak Localization or a Fundamental Property?

Richard Akis; Dragica Vasileska; David K. Ferry; Jonathan P. Bird

doi:10.1143/JJAP.38.328

Zero Field Magnetoresistance Peaks in Open Quantum Dots: Weak Localization or a Fundamental Property?

Richard Akis, Dragica Vasileska, David K. Ferry, Jonathan P. Bird

Research output: Contribution to journal › Conference article › peer-review

2 Scopus citations

Abstract

We have performed numerical simulations of the magnetotransport of open quantum dots with contacts supporting several modes. We reproduce the zero field resistance peaks seen in experiments performed on such structures, a phenomenon previously attributed to weak localization. Our results, however, indicate that these peaks can have an entirely different origin, involving the zero field crossings of conductance resonance lines that reflect the underlying dot spectrum. Even with significant ensemble averaging. the nature of these crossings largely determines the shape and width of the resistance peaks.

Original language	English (US)
Pages (from-to)	328-331
Number of pages	4
Journal	Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume	38
Issue number	1 B
DOIs	https://doi.org/10.1143/JJAP.38.328
State	Published - 1999
Event	Proceedings of the 1998 International Symposium on Formation, Physics and Device Application of Quantum Dot Structures, QDS-98 - Sapporo, Japan Duration: May 31 1998 → Jun 4 1998

Keywords

Magnetotransport
Numerical simulation
Poisson equation
Quantum dots
Weak localization

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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10.1143/JJAP.38.328

Cite this

Zero Field Magnetoresistance Peaks in Open Quantum Dots: Weak Localization or a Fundamental Property? / Akis, Richard; Vasileska, Dragica; Ferry, David K. et al.
In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 38, No. 1 B, 1999, p. 328-331.

Research output: Contribution to journal › Conference article › peer-review

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title = "Zero Field Magnetoresistance Peaks in Open Quantum Dots: Weak Localization or a Fundamental Property?",

abstract = "We have performed numerical simulations of the magnetotransport of open quantum dots with contacts supporting several modes. We reproduce the zero field resistance peaks seen in experiments performed on such structures, a phenomenon previously attributed to weak localization. Our results, however, indicate that these peaks can have an entirely different origin, involving the zero field crossings of conductance resonance lines that reflect the underlying dot spectrum. Even with significant ensemble averaging. the nature of these crossings largely determines the shape and width of the resistance peaks.",

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AB - We have performed numerical simulations of the magnetotransport of open quantum dots with contacts supporting several modes. We reproduce the zero field resistance peaks seen in experiments performed on such structures, a phenomenon previously attributed to weak localization. Our results, however, indicate that these peaks can have an entirely different origin, involving the zero field crossings of conductance resonance lines that reflect the underlying dot spectrum. Even with significant ensemble averaging. the nature of these crossings largely determines the shape and width of the resistance peaks.

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KW - Poisson equation

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KW - Weak localization

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Zero Field Magnetoresistance Peaks in Open Quantum Dots: Weak Localization or a Fundamental Property?

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Keywords

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