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