Electron spin flip by antiferromagnetic coupling between semiconductor quantum dots

Atsushi Tackeuchi*, Takamasa Kuroda, Yoshiaki Nakata, Masahiro Murayama, Takamitsu Kitamura, Naoki Yokoyama

*この研究の対応する著者

研究成果: Article査読

12 被引用数 (Scopus)

抄録

We have investigated antiferromagnetic coupling between semiconductor quantum dots. Electron spin is observed to flip at 80 ps after photoexcitation via the interdot-exchange interaction. The spin relaxation time under the antiferromagnetic order is extended to 10-12 ns, one order of magnitude longer than that in isolated quantum dots. The antiferromagnetic order exists at temperatures lower than 50-80 K. The photoluminescence experiments for various carrier densities show that antiferromagnetic coupling disappears when the electron pairing probability is low. A model calculation based on the Heitler-London approximation supports the finding that the antiferromagnetic order is observable at low temperature.

本文言語English
ページ(範囲)4278-4281
ページ数4
ジャーナルJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
42
7 A
DOI
出版ステータスPublished - 2003 7月

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)

フィンガープリント

「Electron spin flip by antiferromagnetic coupling between semiconductor quantum dots」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル