Addition Spectra of Quantum Dots in Strong Magnetic Fields

Details Addition Spectra of Quantum Dots in Strong Magnetic Fields Addition Spectra of Quantum Dots in Strong Magnetic Fields

1993-06-03

arxiv.org/abs/cond-mat/9306008v1

Physics

Condensed Matter

11 pages, 3 figures (available from yang@nrcphy1.phy.nrc.ca). Revtex 3.0. (IUCM93-010)

Scientific paper

10.1103/PhysRevLett.71.3194

We consider the magnetic field dependence of the chemical potential for parabolically confined quantum dots in a strong magnetic field. Approximate expressions based on the notion that the size of a dot is determined by a competition between confinement and interaction energies are shown to be consistent with exact diagonalization studies for small quantum dots. Fine structure is present in the magnetic field dependence which cannot be explained without a full many-body description and is associated with ground-state level crossings as a function of confinement strength or Zeeman interaction strength. Some of this fine structure is associated with precursors of the bulk incompressible states responsible for the fractional quantum Hall effect.

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