Manipulation of exchange coupling energy in a few-electron double quantum dot

T. Hatano, S. Amaha, T. Kubo, Y. Tokura, Y. Nishi, Yoshiro Hirayama, S. Tarucha

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

We have used a hybrid vertical-lateral double quantum dot to study the excitation energy spectrum for one- and two-electron states, which are effectively formed on top of a certain core shell. We have observed bonding and antibonding states, and exchange coupled singlet and triplet states for the one- and two-electron states, respectively, and derived the interdot tunnel coupling and exchange coupling energies for various parameters of interdot level detuning, central gate voltage and magnetic field. The obtained exchange coupling energy is consistently reproduced by calculation using the Hund-Mulliken method.

Original languageEnglish
Article number241301
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume77
Issue number24
DOIs
Publication statusPublished - 2008 Jun 2

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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