Interaction Effects in the Mesoscopic Regime: A Quantum Monte Carlo Study of Irregular Quantum Dots
arXiv:cond-mat/0411242 · doi:10.1103/PhysRevB.71.241306
Abstract
We address the issue of accurately treating interaction effects in the mesoscopic regime by investigating the ground state properties of isolated irregular quantum dots. Quantum Monte Carlo techniques are used to calculate the distributions of ground state spin and addition energy. We find a reduced probability of high spin and a somewhat larger even/odd alternation in the addition energy from quantum Monte Carlo than in local spin density functional theory. In both approaches, the even/odd effect gets smaller with increasing number of electrons, contrary to the theoretical understanding of large dots. We argue that the local spin density approximation over predicts the effects of interactions in quantum dots.
Final Version, to appear in PRB as a Rapid Comm
References in corpus (17)
- Quantum Effects in Coulomb Blockade
- The Addition Spectrum of a Lateral Dot from Coulomb and Spin Blockade Spectroscopy
- Spin-density-functional theory of circular and elliptical quantum dots
- Statistics of Coulomb Blockade Peak Spacings
- Fluctuations of Conductance Peak Spacings in the Coulomb Blockade Regime: Role of Electron-Electron Interaction
- Diffusion Monte Carlo study of circular quantum dots
- Signatures of spin pairing in a quantum dot in the Coulomb blockade regime
- Wigner molecules in quantum dots: a quantum Monte Carlo study
- Ground state spin and Coulomb blockade peak motion in chaotic quantum dots
- Interactions in Chaotic Nanoparticles: Fluctuations in Coulomb Blockade Peak Spacings
- Spin and Conductance-Peak-Spacing Distributions in Large Quantum Dots: A Density Functional Theory Study
- Erratum: Diffusion Monte Carlo study of circular quantum dots
- Spin and e-e interactions in quantum dots: Leading order corrections to universality and temperature effects
- Coulomb Blockade Peak Spacing Distribution: The Interplay of Temperature and Spin
- Electronic structure of self-assembled quantum dots: comparison between density functional theory and diffusion quantum Monte Carlo
- Electron-Electron Interactions in Isolated and Realistic Quantum Dots: A Density Functional Theory Study
- Landau Fermi Liquid Picture of Spin Density Functional Theory: Strutinsky Approach to Quantum Dots
Cited by in corpus (6)
- Correlation Induced Inhomogeneity in Circular Quantum Dots
- Incipient Wigner Localization in Circular Quantum Dots
- Path-integral Monte Carlo simulations for interacting few-electron quantum dots with spin-orbit coupling
- Interaction-Induced Strong Localization in Quantum Dots
- Analysis of vibrational normal modes for Coulomb clusters
- Influence of the nature of confinement on the melting of Wigner molecules in quantum dots