Investigations of backscattering peaks and of the nature of the confining potential in open quantum dots

R. Brunner; R. Meisels; F. Kuchar; M. ElHassan; J. Bird; K. Ishibashi

doi:10.1016/j.physe.2003.11.200

Investigations of backscattering peaks and of the nature of the confining potential in open quantum dots

R. Brunner
, R. Meisels
, F. Kuchar
, M. ElHassan
, J. Bird
, K. Ishibashi

Department of Electrical Engineering

University of Leoben
Arizona State University
RIKEN

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

9 Scopus citations

Abstract

The properties of open quantum dots are examined in magneto-transport. The quantum dots are prepared from a two-dimensional electron system (2DES) in AlGaAs/GaAs by lateral gate structures. These quantum dots are open, i.e. they are still connected to the surrounding 2DES regions. The low magnetic field magnetoresistance shows peak structures. These structures can be related to semi-classical ballistic trajectories in the confining potential of a dot. The calculations of different confining potentials (abrupt "hard-wall" and parabolic "soft-wall") are compared with the experimental results. The experiments are better described by a soft-wall potential.

Original language	English
Pages (from-to)	491-495
Number of pages	5
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	21
Issue number	2-4
DOIs	https://doi.org/10.1016/j.physe.2003.11.200
State	Published - Mar 2004
Event	Proceedings of the Eleventh International Conference on Modulation (MSS11) - Nara, Japan Duration: Jul 14 2003 → Jul 18 2003

Keywords

Ballistic trajectories
Quantum dot

Access to Document

10.1016/j.physe.2003.11.200

Cite this

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abstract = "The properties of open quantum dots are examined in magneto-transport. The quantum dots are prepared from a two-dimensional electron system (2DES) in AlGaAs/GaAs by lateral gate structures. These quantum dots are open, i.e. they are still connected to the surrounding 2DES regions. The low magnetic field magnetoresistance shows peak structures. These structures can be related to semi-classical ballistic trajectories in the confining potential of a dot. The calculations of different confining potentials (abrupt {"}hard-wall{"} and parabolic {"}soft-wall{"}) are compared with the experimental results. The experiments are better described by a soft-wall potential.",

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

issn = "1386-9477",

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note = "Proceedings of the Eleventh International Conference on Modulation (MSS11) ; Conference date: 14-07-2003 Through 18-07-2003",

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T1 - Investigations of backscattering peaks and of the nature of the confining potential in open quantum dots

AU - Brunner, R.

AU - Meisels, R.

AU - Kuchar, F.

AU - ElHassan, M.

AU - Bird, J.

AU - Ishibashi, K.

PY - 2004/3

Y1 - 2004/3

N2 - The properties of open quantum dots are examined in magneto-transport. The quantum dots are prepared from a two-dimensional electron system (2DES) in AlGaAs/GaAs by lateral gate structures. These quantum dots are open, i.e. they are still connected to the surrounding 2DES regions. The low magnetic field magnetoresistance shows peak structures. These structures can be related to semi-classical ballistic trajectories in the confining potential of a dot. The calculations of different confining potentials (abrupt "hard-wall" and parabolic "soft-wall") are compared with the experimental results. The experiments are better described by a soft-wall potential.

AB - The properties of open quantum dots are examined in magneto-transport. The quantum dots are prepared from a two-dimensional electron system (2DES) in AlGaAs/GaAs by lateral gate structures. These quantum dots are open, i.e. they are still connected to the surrounding 2DES regions. The low magnetic field magnetoresistance shows peak structures. These structures can be related to semi-classical ballistic trajectories in the confining potential of a dot. The calculations of different confining potentials (abrupt "hard-wall" and parabolic "soft-wall") are compared with the experimental results. The experiments are better described by a soft-wall potential.

KW - Ballistic trajectories

KW - Quantum dot

UR - https://www.scopus.com/pages/publications/1642370998

U2 - 10.1016/j.physe.2003.11.200

DO - 10.1016/j.physe.2003.11.200

M3 - Conference article

AN - SCOPUS:1642370998

SN - 1386-9477

VL - 21

SP - 491

EP - 495

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 2-4

T2 - Proceedings of the Eleventh International Conference on Modulation (MSS11)

Y2 - 14 July 2003 through 18 July 2003

ER -

Investigations of backscattering peaks and of the nature of the confining potential in open quantum dots

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Keywords

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