2009/11/11 by Fabio Cavaliere, F. Cavaliere, Umberto De Giovannini +5 · 2 citations
Engineering · Physics and Astronomy · #Molecular Junctions and Nanostructures #Quantum and electron transport phenomena #Surface and Thin Film Phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1088/1367-2630/11/12/123004
published as New Journal of Physics 11, 123004 (2009) · 26 pages, 14 figures, Accepted for publication on New Journal of Physics
arxiv created 2009/11/11 · openalex publication_date 2009/12/03 · arxiv updated 2011/10/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
The transport properties of quantum dots with up to N =7 electrons ranging from a weak to a strong interacting regime are investigated via the projected Hartree–Fock technique. As interactions increase radial order develops in the dot, with the formation of ring and centred-ring structures. Subsequently, angular correlations appear, signalling the formation of a Wigner molecule state. We show striking signatures of the emergence of Wigner molecules, detected in transport. In the linear regime, conductance is exponentially suppressed as the interaction strength grows. A further suppression is observed when centred-ring structures develop, or peculiar spin textures appear. In the nonlinear regime, the formation of molecular states may even lead to a conductance enhancement.