Classically, the strangest of things, when quantum dots are quantum rings

Andre Delage; Yan Feng; Paul J. Kelly; A. Sachrajda; R. P. Taylor

doi:10.1117/12.175712

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11 May 1994 Classically, the strangest of things, when quantum dots are quantum rings

Andre Delage, Yan Feng, Paul J. Kelly, A. Sachrajda, R. P. Taylor

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Proceedings Volume 2139, Quantum Well and Superlattice Physics V; (1994) https://doi.org/10.1117/12.175712
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

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.

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Andre Delage, Yan Feng, Paul J. Kelly, A. Sachrajda, and R. P. Taylor "Classically, the strangest of things, when quantum dots are quantum rings", Proc. SPIE 2139, Quantum Well and Superlattice Physics V, (11 May 1994); https://doi.org/10.1117/12.175712

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