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 language | English |
|---|---|
| Pages (from-to) | 25-29 |
| Number of pages | 5 |
| Journal | Physica B: Condensed Matter |
| Volume | 314 |
| Issue number | 1-4 |
| DOIs | |
| Publication status | Published - 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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Cite this
Tackeuchi, A., Kuroda, T., Sasou, R., Nakata, Y., & Yokoyama, N. (2002). Antiferromagnetic coupling between semiconductor quantum dots. Physica B: Condensed Matter, 314(1-4), 25-29. https://doi.org/10.1016/S0921-4526(01)01394-1