Tunable tunnel and exchange couplings in double quantum dots

S. Tarucha, T. Hatano, M. Stofa

研究成果: Conference contribution

抄録

We prepare a novel double dot device in a hybrid vertical-lateral geometry to study the electronic configurations of the tunnel-coupled and exchange-coupled states. In this device two two-dimensional quantum dots coupled side by side, and current flows vertically. From transport measurements we derive important parameters such as the inter- and mtra-dot Coulomb energies, the tunnel coupling energy and the potential detuning between the two dots to influence the electronic configurations in a double dot. Thus we confirm the formation of the Heitler-I.ondon two-electron state in the weak tunnel coupling regime, and also find that the tunnel and exchange couplings are tunable with coupling gate voltage and magnetic field.

本文言語English
ホスト出版物のタイトルProceedings of the 8th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, ISQM-Tokyo 2005
出版社World Scientific Publishing Co. Pte Ltd
ページ92-98
ページ数7
ISBN(印刷版)9812568581, 9789812568588
出版ステータスPublished - 2006
外部発表はい
イベント8th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, ISQM-Tokyo 2005 - Hatoyama, Saitama, Japan
継続期間: 2005 8月 222005 8月 25

出版物シリーズ

名前Proceedings of the 8th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, ISQM-Tokyo 2005

Other

Other8th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, ISQM-Tokyo 2005
国/地域Japan
CityHatoyama, Saitama
Period05/8/2205/8/25

ASJC Scopus subject areas

  • 原子分子物理学および光学

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