Spontaneous Symmetry Breaking in Single and Molecular Quantum Dots

摘要: Classes of spontaneous symmetry breaking at zero and low magnetic fields in single quantum dots (QD{close_quote}s) dot molecules (QDM{close_quote}s) are discussed relation to the ratio R{sub W} between interelectron Coulomb repulsion harmonic confinement, using spin-and-space unrestricted Hartree-Fock calculations. These include Wigner crystallization for W}{gt}1 , formation noncrystallized electron puddles localized on individual QDM{close_quote}s, as well spin-density waves QD{close_quote}s, W}{lt}1 . {copyright} {ital 1999} The American Physical Society}