Quantum interference on electron wave spreading over a coupled dot

Nobuyuki Aoki; Daisuke Onishi; Yoshikazu Iwase; Kohji Ishibashi; Jonathan P. Bird; David K. Ferry; Yuichi Ochiai

doi:10.1016/S1386-9477(02)00995-5

Quantum interference on electron wave spreading over a coupled dot

Nobuyuki Aoki
, Daisuke Onishi
, Yoshikazu Iwase
, Kohji Ishibashi
, Jonathan P. Bird
, David K. Ferry
, Yuichi Ochiai

Department of Electrical Engineering

Chiba University
RIKEN
Arizona State University

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

Abstract

The characteristics of the conductance fluctuations, observed in the low-temperature magnetoresistance of an open quantum-dot molecule formed from a pair of split-gate quantum dots, have been studied. The evolution of these fluctuations suggests a decrease in the typical area for coherent interference with decreasing the coupling strength between the two dot. We discuss this behavior in terms of a transition from multi- to single-dot interference as a function of the inter-dot coupling. Moreover, an existence of interference trajectories which were independent of the dot coupling was also found in our analysis.

Original language	English
Pages (from-to)	89-90
Number of pages	2
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	18
Issue number	1-3
DOIs	https://doi.org/10.1016/S1386-9477(02)00995-5
State	Published - May 2003
Event	23rd International Conference on Low Temperature Physics - Hiroshima, Japan Duration: Aug 20 2002 → Aug 27 2002

Keywords

Coupled dot
Low temperature
Magnetoconductance
Quantum interference
Quantum-dot molecule

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10.1016/S1386-9477(02)00995-5

Cite this

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title = "Quantum interference on electron wave spreading over a coupled dot",

abstract = "The characteristics of the conductance fluctuations, observed in the low-temperature magnetoresistance of an open quantum-dot molecule formed from a pair of split-gate quantum dots, have been studied. The evolution of these fluctuations suggests a decrease in the typical area for coherent interference with decreasing the coupling strength between the two dot. We discuss this behavior in terms of a transition from multi- to single-dot interference as a function of the inter-dot coupling. Moreover, an existence of interference trajectories which were independent of the dot coupling was also found in our analysis.",

keywords = "Coupled dot, Low temperature, Magnetoconductance, Quantum interference, Quantum-dot molecule",

author = "Nobuyuki Aoki and Daisuke Onishi and Yoshikazu Iwase and Kohji Ishibashi and Bird, \{Jonathan P.\} and Ferry, \{David K.\} and Yuichi Ochiai",

year = "2003",

month = may,

doi = "10.1016/S1386-9477(02)00995-5",

language = "English",

volume = "18",

pages = "89--90",

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

issn = "1386-9477",

publisher = "Elsevier B.V.",

number = "1-3",

note = "23rd International Conference on Low Temperature Physics ; Conference date: 20-08-2002 Through 27-08-2002",

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TY - JOUR

T1 - Quantum interference on electron wave spreading over a coupled dot

AU - Aoki, Nobuyuki

AU - Onishi, Daisuke

AU - Iwase, Yoshikazu

AU - Ishibashi, Kohji

AU - Bird, Jonathan P.

AU - Ferry, David K.

AU - Ochiai, Yuichi

PY - 2003/5

Y1 - 2003/5

N2 - The characteristics of the conductance fluctuations, observed in the low-temperature magnetoresistance of an open quantum-dot molecule formed from a pair of split-gate quantum dots, have been studied. The evolution of these fluctuations suggests a decrease in the typical area for coherent interference with decreasing the coupling strength between the two dot. We discuss this behavior in terms of a transition from multi- to single-dot interference as a function of the inter-dot coupling. Moreover, an existence of interference trajectories which were independent of the dot coupling was also found in our analysis.

AB - The characteristics of the conductance fluctuations, observed in the low-temperature magnetoresistance of an open quantum-dot molecule formed from a pair of split-gate quantum dots, have been studied. The evolution of these fluctuations suggests a decrease in the typical area for coherent interference with decreasing the coupling strength between the two dot. We discuss this behavior in terms of a transition from multi- to single-dot interference as a function of the inter-dot coupling. Moreover, an existence of interference trajectories which were independent of the dot coupling was also found in our analysis.

KW - Coupled dot

KW - Low temperature

KW - Magnetoconductance

KW - Quantum interference

KW - Quantum-dot molecule

UR - https://www.scopus.com/pages/publications/0037504609

U2 - 10.1016/S1386-9477(02)00995-5

DO - 10.1016/S1386-9477(02)00995-5

M3 - Conference article

AN - SCOPUS:0037504609

SN - 1386-9477

VL - 18

SP - 89

EP - 90

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 1-3

T2 - 23rd International Conference on Low Temperature Physics

Y2 - 20 August 2002 through 27 August 2002

ER -

Quantum interference on electron wave spreading over a coupled dot

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