Correlation Induced Inhomogeneity in Circular Quantum Dots

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dc.creatorGhosal, Amit
dc.creatorGuclu, A. D.
dc.creatorUmrigar, C. J.
dc.creatorUllmo, Denis
dc.creatorBaranger, Harold U.
dc.date2006-01-09
dc.date2006-09-07
dc.date.accessioned2026-07-07T06:57:26Z
dc.date.available2026-07-07T06:57:26Z
dc.descriptionProperties of the "electron gas" - in which conduction electrons interact by means of Coulomb forces but ionic potentials are neglected - change dramatically depending on the balance between kinetic energy and Coulomb repulsion. The limits are well understood. For very weak interactions (high density), the system behaves as a Fermi liquid, with delocalized electrons. In contrast, in the strongly interacting limit (low density), the electrons localize and order into a Wigner crystal phase. The physics at intermediate densities, however, remains a subject of fundamental research. Here, we study the intermediate-density electron gas confined to a circular disc, where the degree of confinement can be tuned to control the density. Using accurate quantum Monte Carlo techniques, we show that the electron-electron correlation induced by an increase of the interaction first smoothly causes rings, and then angular modulation, without any signature of a sharp transition in this density range. This suggests that inhomogeneities in a confined system, which exist even without interactions, are significantly enhanced by correlations.
dc.descriptionfinal version, modified introduction and clarifications, 4 pages
dc.identifierhttps://arxiv.org/abs/cond-mat/0601178
dc.identifierhttp://arxiv.org/abs/cond-mat/0601178
dc.identifierNature Physics 2, 336-340 (2006)
dc.identifierdoi:10.1038/nphys293
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/106963
dc.subjectMesoscale and Nanoscale Physics
dc.subjectStrongly Correlated Electrons
dc.titleCorrelation Induced Inhomogeneity in Circular Quantum Dots
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