The Kondo effect in an artificial quantum dot molecule.


Journal Article

Double quantum dots provide an ideal model system for studying interactions between localized impurity spins. We report on the transport properties of a series-coupled double quantum dot as electrons are added one by one onto the dots. When the many-body molecular states are formed, we observe a splitting of the Kondo resonance peak in the differential conductance. This splitting reflects the energy difference between the bonding and antibonding states formed by the coherent superposition of the Kondo states of each dot. The occurrence of the Kondo resonance and its magnetic field dependence agree with a simple interpretation of the spin status of a double quantum dot.

Full Text

Duke Authors

Cited Authors

  • Jeong, H; Chang, AM; Melloch, MR

Published Date

  • September 2001

Published In

Volume / Issue

  • 293 / 5538

Start / End Page

  • 2221 - 2223

PubMed ID

  • 11567130

Pubmed Central ID

  • 11567130

Electronic International Standard Serial Number (EISSN)

  • 1095-9203

International Standard Serial Number (ISSN)

  • 0036-8075

Digital Object Identifier (DOI)

  • 10.1126/science.1063182


  • eng