Wigner Molecules in Nanostructures
نویسنده
چکیده
The one– and two– particle densities of up to four interacting electrons with spin, confined within a quasi one–dimensional “quantum dot” are calculated by numerical diagonalization. The transition from a dense homogeneous charge distribution to a dilute localized Wigner–type electron arrangement is investigated. The influence of the long range part of the Coulomb interaction is studied. When the interaction is exponentially cut off the “crystallized” Wigner molecule is destroyed in favor of an inhomogeneous charge distribution similar to a charge density wave . PACS. 71.45.Lr – Charge–density–wave systems. PACS. 73.20.Dx – Electron states in low–dimensional structures. PACS. 73.20.Mf – Collective excitations.
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