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Nuclear spin depolarization via slow spin diffusion in single InAlAs quantum dots observed by using erase-pump-probe technique
| Title: | Nuclear spin depolarization via slow spin diffusion in single InAlAs quantum dots observed by using erase-pump-probe technique |
| Authors: | Adachi, S. Browse this author →KAKEN DB | | Kaji, R. Browse this author | | Furukawa, S. Browse this author | | Yokoyama, Y. Browse this author | | Muto, S. Browse this author |
| Keywords: | aluminium compounds | | hyperfine interactions | | III-V semiconductors | | indium compounds | | nanofabrication | | nuclear polarisation | | Overhauser effect | | self-assembly | | semiconductor growth | | semiconductor quantum dots | | spin dynamics |
| Issue Date: | 15-May-2012 |
| Publisher: | American Institute of Physics |
| Journal Title: | Journal of Applied Physics |
| Volume: | 111 |
| Issue: | 10 |
| Start Page: | 103531 |
| Publisher DOI: | 10.1063/1.4721902 |
| Abstract: | Nuclear spin diffusion in single self-assembled InAlAs quantum dots was studied by using erase-pump-probe technique. As a measure of nuclear spin polarization, transients of the Overhauser shift (OHS) of positive trion were probed in the respective pulse region. The achieved stable OHS was relaxed with a long depolarization time as long as a few tens of seconds and a diffusion constant of ～5 × 10^[-15] cm2/s was estimated. The slow transfer of the spin energy is considered to be due to the dipole-dipole interaction of the nuclei. In addition, through the magnetic field dependence of OHS, the stability of the nuclear spin polarization was briefly discussed, and the saturated maximum values of OHS were investigated experimentally. |
| Rights: | Copyright 2012 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in J. Appl. Phys. 111, 103531 (2012) and may be found at https://dx.doi.org/10.1063/1.4721902 |
| Type: | article |
| URI: | http://hdl.handle.net/2115/49405 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 足立 智
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