Antiferromagnetic coupling between semiconductor quantum dots

Atsushi 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

    Fingerprint

    Exchange interactions
    Semiconductor quantum dots
    quantum dots
    Magnetic couplings
    Relaxation time
    Photoluminescence
    relaxation time
    interactions
    photoluminescence
    Temperature
    energy

    Keywords

    • Antiferromagnetization
    • Quantum dots
    • Spin

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics

    Cite this

    Antiferromagnetic coupling between semiconductor quantum dots. / Tackeuchi, Atsushi; Kuroda, T.; Sasou, R.; Nakata, Y.; Yokoyama, N.

    In: Physica B: Condensed Matter, Vol. 314, No. 1-4, 03.2002, p. 25-29.

    Research output: Contribution to journalArticle

    Tackeuchi, Atsushi ; Kuroda, T. ; Sasou, R. ; Nakata, Y. ; Yokoyama, N. / Antiferromagnetic coupling between semiconductor quantum dots. In: Physica B: Condensed Matter. 2002 ; Vol. 314, No. 1-4. pp. 25-29.
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