Interaction-induced strong localization in quantum dots

Journal Article

We argue that Coulomb blockade phenomena are a useful probe of the crossover to strong correlation in quantum dots. Through calculations at low density using variational and diffusion quantum Monte Carlo (up to rs ∼55), we find that the addition energy shows a clear progression from features associated with shell structure to those caused by commensurability of a Wigner crystal. This crossover (which occurs near rs ∼20 for spin-polarized electrons) is, then, a signature of interaction-driven localization. As the addition energy is directly measurable in Coulomb blockade conductance experiments, this provides a direct probe of localization in the low density electron gas. © 2008 The American Physical Society.

Full Text

Duke Authors

Cited Authors

  • Güçlü, AD; Ghosal, A; Umrigar, CJ; Baranger, HU

Published Date

  • January 2, 2008

Published In

Volume / Issue

  • 77 / 4

Electronic International Standard Serial Number (EISSN)

  • 1550-235X

International Standard Serial Number (ISSN)

  • 1098-0121

Digital Object Identifier (DOI)

  • 10.1103/PhysRevB.77.041301

Citation Source

  • Scopus