Antiferromagnetic coupling between semiconductor quantum dots

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

Research output: Contribution to journalArticle

11 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 1

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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