Size effects in the electronic properties of finite arrays of exchange-coupled quantum dots

J. X. Wang, S. Kais, F. Remade, Rafi D. Levine

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Transport properties of arrays of metallic quantum dots are governed by the distance-dependent exchange coupling between the dots. It is shown that the effective value of the exchange coupling, as measured by the charging energy per dot, depends monotonically on the size of the array. The effect saturates for hexagonal arrays of over 75 unit cells. The discussion uses a multistage block renormalization group approach applied to the Hubbard Hamiltonian. A first-order phase transition occurs upon compression of the lattice, and the size dependence is qualitatively different for the two phases.

Original languageEnglish
Pages (from-to)12847-12850
Number of pages4
JournalJournal of Physical Chemistry B
Volume106
Issue number50
DOIs
Publication statusPublished - 19 Dec 2002
Externally publishedYes

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Exchange coupling
Electronic properties
Semiconductor quantum dots
quantum dots
Hamiltonians
electronics
Transport properties
Phase transitions
charging
transport properties
cells
energy

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Size effects in the electronic properties of finite arrays of exchange-coupled quantum dots. / Wang, J. X.; Kais, S.; Remade, F.; Levine, Rafi D.

In: Journal of Physical Chemistry B, Vol. 106, No. 50, 19.12.2002, p. 12847-12850.

Research output: Contribution to journalArticle

Wang, J. X. ; Kais, S. ; Remade, F. ; Levine, Rafi D. / Size effects in the electronic properties of finite arrays of exchange-coupled quantum dots. In: Journal of Physical Chemistry B. 2002 ; Vol. 106, No. 50. pp. 12847-12850.
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