Antiferromagnetic coupling between semiconductor quantum dots

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

We have investigated magnetic coupling between semiconductor quantum dots. The antiferromagnetization process based on the interdot exchange interaction has been directly observed using time-resolved spin-dependent photoluminescence measurements. The antiferromagnetic order that proves the interdot exchange interaction energy to be negative is found to exist at temperatures lower than 50-80 K. The spin relaxation time under the antiferromagnetic order is extended to 10-12 ns, an order of magnitude longer than that in isolated quantum dots.

Original languageEnglish
Pages (from-to)25-29
Number of pages5
JournalPhysica B: Condensed Matter
Volume314
Issue number1-4
DOIs
Publication statusPublished - 2002 Mar

Keywords

  • Antiferromagnetization
  • Quantum dots
  • Spin

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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