Correlated charge polarization in a chain of coupled quantum dots

R. Kotlyar, C. Stafford

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

Coherent charge transfer in a linear array of tunnel-coupled quantum dots, electrostatically coupled to external gates, is investigated using the Bethe ansatz for a symmetrically biased Hubbard chain. Charge polarization in this correlated system is shown to proceed via two distinct processes: formation of bound states in the metallic phase, and charge-transfer processes corresponding to a superposition of antibound states at opposite ends of the chain in the Mott-insulating phase. The polarizability in the insulating phase of the chain exhibits a universal scaling behavior, while the polarization charge in the metallic phase of the model is shown to be quantized in units of (Formula presented).

Original languageEnglish (US)
Pages (from-to)R1746-R1749
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume58
Issue number4
DOIs
StatePublished - Jan 1 1998
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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