TY - JOUR
T1 - Antiferromagnetic coupling between semiconductor quantum dots
AU - Tackeuchi, A.
AU - Kuroda, T.
AU - Sasou, R.
AU - Nakata, Y.
AU - Yokoyama, N.
N1 - Funding Information:
The authors would like to thank Professor S. Muto of Hokkaido University for helpful discussions. We also appreciate M. Murayama, Y. Ohshima and T. Yabushita for their help in the experiments. This work was supported in part by a grant-in-aid for Scientific Research on the Priority Area “Photonics Based on Wavelength Integration and Manipulation” (No. 13026225), from The Ministry of Education, Culture, Sports, Science and Technology and a Waseda University Grant for Special Research Projects.
PY - 2002/3
Y1 - 2002/3
N2 - 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.
AB - 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.
KW - Antiferromagnetization
KW - Quantum dots
KW - Spin
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U2 - 10.1016/S0921-4526(01)01394-1
DO - 10.1016/S0921-4526(01)01394-1
M3 - Article
AN - SCOPUS:0036503920
VL - 314
SP - 25
EP - 29
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
IS - 1-4
ER -