Abstract
Classes of spontaneous symmetry breaking at zero and low magnetic fields in single quantum dots (QD's) and quantum dot molecules (QDM's) are discussed in relation to the ratio between the interelectron Coulomb repulsion and the harmonic confinement, using spin-and-space unrestricted Hartree-Fock calculations. These include Wigner crystallization for , and formation of noncrystallized electron puddles localized on the individual dots in QDM's, as well as spin-density waves in single QD's, for .
- Received 30 December 1998
DOI:https://doi.org/10.1103/PhysRevLett.82.5325
©1999 American Physical Society