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Two-dimensional quantum dots in high magnetic fields: Rotating-electron-molecule versus composite-fermion approach

2003/02/28 by Constantine Yannouleas, Uzi Landman · 2 citations
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall #cond-mat.str-el #nucl-th #physics.atom-ph

paper · pdf · doi:10.1103/physrevb.68.035326

published as Phys.Rev. B68 (2003) 035326 · Extensive clarifications were added (see new footnotes) regarding the difference between the rotating Wigner molecule and the bulk Wigner crystal; also regarding the influence of an external confining potential. 12 pages. Revtex4 with 6 EPS figures and 5 tables . For related papers, see http://www.prism.gatech.edu/~ph274cy

arxiv created 2003/05/20 · openalex publication_date 2003/07/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Exact diagonalization results are reported for the lowest rotational band of N=6 electrons in strong magnetic fields in the range of high angular momenta, 70<~L<~140 (covering the corresponding range of fractional filling factors, 1/5>~\ensuremathν>~1/9). A detailed comparison of energetic, spectral, and transport properties (specifically, magic angular momenta, radial electron densities, occupation number distributions, overlaps and total energies, and exponents of current-voltage power law) shows that the recently discovered rotating-electron-molecule wave functions [Phys. Rev. B 66, 115315 (2002)] provide a superior description compared to the composite-fermion--Jastrow-Laughlin ones.

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