Observation of interdot tunneling process of spin-polarized electrons

A. Tackeuchi*, Y. Nakata, R. Sasou, K. Mase, T. Kuroda, N. Yokoyama

*この研究の対応する著者

研究成果: Article査読

8 被引用数 (Scopus)

抄録

We have directly observed the spin-polarized electron tunneling process between double quantum dots (QDs) using spin-dependent time-resolved photoluminescence measurements. The spin relaxation times in isolated In0.9Al0.1As Stranski-Krastanow (SK)-mode QDs and InAs SK-mode QDs were measured as 1.3 and 1.2 ns, respectively. The fact that these times are longer than those of quantum wells indicates that the spin relaxation rate is suppressed in QDs by the increased zero dimensionality. The measurement of tunneling between double QDs which consist of In0.9Al0.1As QDs and InAs QDs indicates that the spin relaxation time is not affected by the tunneling process. The spin-polarized carriers were found to tunnel from one dot to another dot while retaining spin polarization.

本文言語English
ページ(範囲)32-35
ページ数4
ジャーナルPhysica E: Low-Dimensional Systems and Nanostructures
10
1-3
DOI
出版ステータスPublished - 2001 5月

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 原子分子物理学および光学
  • 凝縮系物理学

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