Phys. Rev. Lett. 90, 026806 (2003) [4 pages]Spin and Conductance-Peak-Spacing Distributions in Large Quantum Dots: A Density-Functional Theory StudyReceived 7 August 2002; published 17 January 2003 We use spin-density-functional theory to study the spacing between conductance peaks and the ground-state spin of 2D model quantum dots with up to 200 electrons. Distributions for different ranges of electron number are obtained in both symmetric and asymmetric potentials. The even/odd effect is pronounced for small symmetric dots but vanishes for large asymmetric ones, suggesting substantially stronger interaction effects than expected. The fraction of high-spin ground states is remarkably large. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.90.026806
DOI:
10.1103/PhysRevLett.90.026806
PACS:
73.23.Hk, 73.40.Gk, 73.63.Kv
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