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