Spontaneous spin polarization and electron localization in constrained geometries: The Wigner transition in nanowires

  • Hughes D
  • Ballone P
  • 10


    Mendeley users who have this article in their library.
  • 7


    Citations of this article.


The Wigner transition in a jellium model of cylindrical nanowires has been investigated by density-functional computations using the local spin-density approximation. A wide range of background densities ρb has been explored from the nearly ideal metallic regime (rs=[3/4πρb]1/3=1) to the high correlation limit (rs=100). Computations have been performed using an unconstrained plane wave expansion for the Kohn–Sham orbitals and a large simulation cell with up to 480 electrons. The electron and spin distributions retain the cylindrical symmetry of the Hamiltonian at high density, while electron localization and spin polarization arise nearly simultaneously in low-density wires (rs∼30). At sufficiently low density (rs≥40), the ground-state electron distribution is the superposition of well defined and nearly disjoint droplets, whose charge and spin densities integrate almost exactly to one electron and 1/2μB, respectively. Droplets are arranged on radial shells and define a distorted lattice whose structure is intermediate between bcc and fcc. Dislocations and grain boundaries are apparent in the droplets’ configuration found by our simulations. Our computations aim at modeling the behavior of experimental low-carried density systems made of lightly doped semiconductor nanostructures or conducting polymers.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • D. Hughes

  • P. Ballone

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free