Crossover between the Dense Electron-Hole Phase and the BCS Excitonic Phase in Quantum Dots
Mesoscale and Nanoscale Physics
2009-10-31 v3
Abstract
Second order perturbation theory and a Lipkin-Nogami scheme combined with an exact Monte Carlo projection after variation are applied to compute the ground-state energy of electron-hole pairs confined in a parabolic two-dimensional quantum dot. The energy shows nice scaling properties as N or the confinement strength is varied. A crossover from the high-density electron-hole phase to the BCS excitonic phase is found at a density which is roughly four times the close-packing density of excitons.
Keywords
Cite
@article{arxiv.cond-mat/9808333,
title = {Crossover between the Dense Electron-Hole Phase and the BCS Excitonic Phase in Quantum Dots},
author = {Boris A. Rodriguez and Augusto Gonzalez and Luis Quiroga and Roberto Capote and Ferney Rodriguez},
journal= {arXiv preprint arXiv:cond-mat/9808333},
year = {2009}
}
Comments
Improved variational and projection calculations. 17 pages, 3 ps figures. Accepted for publication in Int. J. Mod. Phys. B