Spontaneous Magnetization and Electron Momentum Density in 3D Quantum Dots

Abstract

We discuss an exactly solvable model Hamiltonian for describing the interacting electron gas in a quantum dot. Results for a spherical square well confining potential are presented. The ground state is found to exhibit striking oscillations in spin polarization with dot radius at a fixed electron density. These oscillations are shown to induce characteristic signatures in the momentum density of the electron gas, providing a novel route for direct experimental observation of the dot magnetization via spectroscopies sensitive to the electron momentum density.

5 pages (Revtex4), 4 (eps) figures

References in corpus (6)

• Allowed and forbidden transitions in artificial hydrogen and helium atoms
• The Collapse of the Spin-Singlet Phase in Quantum Dots
• Interactions and Interference in Quantum Dots: Kinks in Coulomb Blockade Peak Positions
• Suppression of Ground-State Magnetization in Finite-Sized Systems Due to Off-Diagonal Interaction Fluctuations
• Spin and Conductance-Peak-Spacing Distributions in Large Quantum Dots: A Density Functional Theory Study
• Fine Structure in Energy Spectra of Ultrasmall Au Nanoparticles

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• Enhancement of Compton Scattering by an Effective Coupling Constant
• Positron studies of surfaces, structure and electronic properties of nanocrystals
• Electron correlations, spontaneous magnetization and momentum density in quantum dots