Electronic Properties and Many-Body Effects in Quantum Dots

Abstract

We investigate the shell structure and electron electron interaction in planar quantum dots within the density functional theory. We observe that the Coulomb repulsion does not alter the shell structure when the dot is symmetric in the two dimensional (2D) plane. If the dot is asymmetric, no pre-determined shell structure emerges except when Coulomb repulsion leads to accidental Coulomb degeneracies. Our investigations on double-quantum dots reveal double electron charging for weak inter-ot coupling, and a significant spin polarization in accordance with Hund's rule. Both these features disappear when interdot coupling is made stronger.

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Document Details

Document Type
Technical Report
Publication Date
Jun 18, 1999
Accession Number
ADP012854

Entities

People

  • Jean-pierre Leburton
  • Satyadev Nagaraja

Organizations

  • University of Illinois Urbana–Champaign

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Conduction Bands
  • Couplings
  • Density Functional Theory
  • Electron Density
  • Electron Electron Interactions
  • Electron Gas
  • Electrons
  • Energy Bands
  • Energy Levels
  • Equations
  • Fermi Levels
  • Ground State
  • Particles
  • Poisson Equation
  • Quantum Dots
  • Quantum Wires
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.
  • Structural Dynamics.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene
  • Quantum Computing
  • Quantum Science - Quantum Dots