Conductance quantization and zero bias peak in a gated quantum wire

R. W. Giannetta; T. A. Olheiser; M. Hannan; I. Adesida; M. R. Melloch

doi:10.1016/j.physe.2004.12.001

Conductance quantization and zero bias peak in a gated quantum wire

R. W. Giannetta, T. A. Olheiser, M. Hannan, I. Adesida, M. R. Melloch

Physics

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

Abstract

Conductance measurements are reported for an 0.4 μm wide GaAs/AlGaAs quantum wire with 7 cross-channel gates. The device exhibited integral conductance steps, magnetoconductance plateaus in agreement with the multiprobe formula and a conductance feature at 0.65(2e ²/h). Differential conductance measurements down to 50 mK revealed a zero bias conductance peak that vanished with an in-plane field of 1 T. The width of this peak was comparable to that reported in high mobility quantum point contacts (Phys. Rev. Lett. 88 (2002) 226805). At low conductances this device also exhibited single electron charging characteristic of a multiple quantum dot.

Original language	English (US)
Pages (from-to)	270-277
Number of pages	8
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	27
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physe.2004.12.001
State	Published - Mar 2005

Keywords

Conductance quantization
Coulomb blockade
Kondo
Mesoscopic
Multiprobe
Zero bias peak

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics

Online availability

10.1016/j.physe.2004.12.001

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title = "Conductance quantization and zero bias peak in a gated quantum wire",

abstract = "Conductance measurements are reported for an 0.4 μm wide GaAs/AlGaAs quantum wire with 7 cross-channel gates. The device exhibited integral conductance steps, magnetoconductance plateaus in agreement with the multiprobe formula and a conductance feature at 0.65(2e 2/h). Differential conductance measurements down to 50 mK revealed a zero bias conductance peak that vanished with an in-plane field of 1 T. The width of this peak was comparable to that reported in high mobility quantum point contacts (Phys. Rev. Lett. 88 (2002) 226805). At low conductances this device also exhibited single electron charging characteristic of a multiple quantum dot.",

keywords = "Conductance quantization, Coulomb blockade, Kondo, Mesoscopic, Multiprobe, Zero bias peak",

author = "Giannetta, {R. W.} and Olheiser, {T. A.} and M. Hannan and I. Adesida and Melloch, {M. R.}",

note = "Funding Information: The authors gratefully acknowledge the support of NSF ECS02-10447, ARO grant DAAH04-95-1-0618, NSF grant ECS 92-02294 and of JSEP grant N00014-90-J-1270. The authors wish to thank V. Petrova and the Center for Microanalysis of Materials at the University of Illinois for assistance in obtaining the SEM image in Fig. 1 . ",

year = "2005",

month = mar,

doi = "10.1016/j.physe.2004.12.001",

language = "English (US)",

volume = "27",

pages = "270--277",

journal = "Physica E: Low-Dimensional Systems and Nanostructures",

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publisher = "Elsevier B.V.",

number = "1-2",

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TY - JOUR

T1 - Conductance quantization and zero bias peak in a gated quantum wire

AU - Giannetta, R. W.

AU - Olheiser, T. A.

AU - Hannan, M.

AU - Adesida, I.

AU - Melloch, M. R.

N1 - Funding Information: The authors gratefully acknowledge the support of NSF ECS02-10447, ARO grant DAAH04-95-1-0618, NSF grant ECS 92-02294 and of JSEP grant N00014-90-J-1270. The authors wish to thank V. Petrova and the Center for Microanalysis of Materials at the University of Illinois for assistance in obtaining the SEM image in Fig. 1 .

PY - 2005/3

Y1 - 2005/3

N2 - Conductance measurements are reported for an 0.4 μm wide GaAs/AlGaAs quantum wire with 7 cross-channel gates. The device exhibited integral conductance steps, magnetoconductance plateaus in agreement with the multiprobe formula and a conductance feature at 0.65(2e 2/h). Differential conductance measurements down to 50 mK revealed a zero bias conductance peak that vanished with an in-plane field of 1 T. The width of this peak was comparable to that reported in high mobility quantum point contacts (Phys. Rev. Lett. 88 (2002) 226805). At low conductances this device also exhibited single electron charging characteristic of a multiple quantum dot.

AB - Conductance measurements are reported for an 0.4 μm wide GaAs/AlGaAs quantum wire with 7 cross-channel gates. The device exhibited integral conductance steps, magnetoconductance plateaus in agreement with the multiprobe formula and a conductance feature at 0.65(2e 2/h). Differential conductance measurements down to 50 mK revealed a zero bias conductance peak that vanished with an in-plane field of 1 T. The width of this peak was comparable to that reported in high mobility quantum point contacts (Phys. Rev. Lett. 88 (2002) 226805). At low conductances this device also exhibited single electron charging characteristic of a multiple quantum dot.

KW - Conductance quantization

KW - Coulomb blockade

KW - Kondo

KW - Mesoscopic

KW - Multiprobe

KW - Zero bias peak

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EP - 277

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 1-2

ER -

Conductance quantization and zero bias peak in a gated quantum wire

Abstract

Keywords

ASJC Scopus subject areas

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