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Proceedings Paper

Classically, the strangest of things, when quantum dots are quantum rings
Author(s): Andre Delage; Yan Feng; Paul J. Kelly; A. Sachrajda; R. P. Taylor
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Paper Abstract

We report electrical transport measurements on gated nanostructures, quantum dots of various shapes and sizes in which magnetic focusing effects are remarkably simple. We compare these results to numerical simulations using a classical billiard ball approach, and investigate the fundamental properties of magnetic focusing of ballistic electrons in a confined geometry. With quantum dots attracting interest in studies ranging from Coulomb blockade to quantum chaos, the ability to determine fundamental properties of the geometry and material is becoming increasingly important. We illustrate the potential of magnetic focusing of ballistic electrons as a tool to probe a confined region for otherwise unobtainable parameters such as the local electron concentration in an dot and the geometry of a dot. An additional gate located in the center of a dot transforms it into a ring. Results and analysis of structures performed to date are given.

Paper Details

Date Published: 11 May 1994
PDF: 8 pages
Proc. SPIE 2139, Quantum Well and Superlattice Physics V, (11 May 1994); doi: 10.1117/12.175712
Show Author Affiliations
Andre Delage, National Research Council of Canada (Canada)
Yan Feng, National Research Council of Canada (Canada)
Paul J. Kelly, National Research Council of Canada (Canada)
A. Sachrajda, National Research Council of Canada (Canada)
R. P. Taylor, Univ. of New South Wales (Australia)


Published in SPIE Proceedings Vol. 2139:
Quantum Well and Superlattice Physics V
Gottfried H. Doehler; Emil S. Koteles, Editor(s)

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