Experimental evidence for coulomb charging effects in an open quantum dot at zero magnetic field

C. T. Liang; M. Y. Simmons; C. G. Smith; G. H. Kim; D. A. Ritchie; M. Pepper

doi:10.1103/PhysRevLett.81.3507

Experimental evidence for coulomb charging effects in an open quantum dot at zero magnetic field

C. T. Liang
, M. Y. Simmons
, C. G. Smith
, G. H. Kim
, D. A. Ritchie
, M. Pepper

University of Cambridge

Research output: Contribution to journal › Article › peer-review

50 Scopus citations

Abstract

We have measured the low-temperature transport properties of an open quantum dot formed in a clean one-dimensional channel. For the first time, at zero magnetic field, continuous and periodic oscillations superimposed upon ballistic conductance steps are observed when the conductance through the dot G exceeds 2e²/h. We ascribe the observed conductance oscillations to evidence for Coulomb charging effects in an open dot. This is supported by the evolution of the oscillating features for G > 2e²/h as a function of both temperature and barrier transparency.

Original language	English
Pages (from-to)	3507-3510
Number of pages	4
Journal	Physical Review Letters
Volume	81
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevLett.81.3507
State	Published - 19 Oct 1998
Externally published	Yes

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10.1103/PhysRevLett.81.3507

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title = "Experimental evidence for coulomb charging effects in an open quantum dot at zero magnetic field",

abstract = "We have measured the low-temperature transport properties of an open quantum dot formed in a clean one-dimensional channel. For the first time, at zero magnetic field, continuous and periodic oscillations superimposed upon ballistic conductance steps are observed when the conductance through the dot G exceeds 2e2/h. We ascribe the observed conductance oscillations to evidence for Coulomb charging effects in an open dot. This is supported by the evolution of the oscillating features for G > 2e2/h as a function of both temperature and barrier transparency.",

author = "Liang, \{C. T.\} and Simmons, \{M. Y.\} and Smith, \{C. G.\} and Kim, \{G. H.\} and Ritchie, \{D. A.\} and M. Pepper",

year = "1998",

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AU - Liang, C. T.

AU - Simmons, M. Y.

AU - Smith, C. G.

AU - Kim, G. H.

AU - Ritchie, D. A.

AU - Pepper, M.

PY - 1998/10/19

Y1 - 1998/10/19

N2 - We have measured the low-temperature transport properties of an open quantum dot formed in a clean one-dimensional channel. For the first time, at zero magnetic field, continuous and periodic oscillations superimposed upon ballistic conductance steps are observed when the conductance through the dot G exceeds 2e2/h. We ascribe the observed conductance oscillations to evidence for Coulomb charging effects in an open dot. This is supported by the evolution of the oscillating features for G > 2e2/h as a function of both temperature and barrier transparency.

AB - We have measured the low-temperature transport properties of an open quantum dot formed in a clean one-dimensional channel. For the first time, at zero magnetic field, continuous and periodic oscillations superimposed upon ballistic conductance steps are observed when the conductance through the dot G exceeds 2e2/h. We ascribe the observed conductance oscillations to evidence for Coulomb charging effects in an open dot. This is supported by the evolution of the oscillating features for G > 2e2/h as a function of both temperature and barrier transparency.

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DO - 10.1103/PhysRevLett.81.3507

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JF - Physical Review Letters

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Experimental evidence for coulomb charging effects in an open quantum dot at zero magnetic field

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