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Geometric suppression of single-particle energy spacings in quantum antidots

Bassett, L. C. and Michael, C. P. and Ford, C. J. B. and Kataoka, M. and Barnes, C. H. W. and Simmons, M. Y. and Ritchie, D. A. (2008) Geometric suppression of single-particle energy spacings in quantum antidots. Physica E, 40 (5). pp. 1633-1636. ISSN 1386-9477. doi:10.1016/j.physe.2007.10.062.

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Quantum antidot (AD) structures have remarkable properties in the integer quantum Hall regime, exhibiting Coulomb-blockade charging and the Kondo effect despite their open geometry. In some regimes a simple single-particle (SP) model suffices to describe experimental observations while in others interaction effects are clearly important, although exactly how and why interactions emerge is unclear. We present a combination of experimental data and the results of new calculations concerning SP orbital states which show how the observed suppression of the energy spacing between states can be explained through a full consideration of the AD potential,without requiring any effects due to electron interactions such as the formation of compressible regions composed of multiple states,which may occur at higher magnetic fields. A full understanding of the regimes in which these effects occur is important for the design of devices to coherently manipulate electrons in edge states using AD resonances.

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Additional Information:Author preprint. arXiv:0707.1237v1 [cond-mat.mes-hall] 9 July 2007. Published version. Copyright © 2008 Elsevier B.V. Available online 26 October 2007. 17th International Conference on Electronic Properties of Two-Dimensional Systems.
Subject Keywords:Antidot; Edge-states; Aharonov–Bohm
Issue or Number:5
Record Number:CaltechAUTHORS:BASpe08
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10254
Deposited By: Archive Administrator
Deposited On:18 Apr 2008
Last Modified:08 Nov 2021 21:06

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