Koppens, F. H. L. and Folk, J. A. and Elzerman, J. M. and Hanson, R. and van Beveren, L. H. W. and Vink, I. T. and Tranitz, H. P. and Wegscheider, Werner and Kouwenhoven, L. P. and Vandersypen, L. M. K. (2005) Control and detection of singlet-triplet mixing in a random nuclear field. SCIENCE, 309 (5739). pp. 1346-1350. ISSN 0036-8075, 1095-9203
Full text not available from this repository. (Request a copy)Abstract
We observed mixing between two-electron singlet and triplet states in a double quantum dot, caused by interactions with nuclear spins in the host semiconductor. This mixing was suppressed when we applied a small magnetic field or increased the interdot tunnel coupling and thereby the singlet-triplet splitting. Electron transport involving transitions between triplets and singlets in turn polarized the nuclei, resulting in marked bistabilities. We extract from the fluctuating nuclear field a [imitation on the time-averaged spin coherence time T*(2) of 25 nanoseconds. Control of the electron-nuclear interaction will therefore be crucial for the coherent manipulation of individual electron spins.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DOUBLE-QUANTUM DOT; MAGNETIC-RESONANCE; ELECTRON-SPIN; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Werner Wegscheider |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 03 May 2021 08:44 |
| Last Modified: | 03 May 2021 08:44 |
| URI: | https://pred.uni-regensburg.de/id/eprint/35762 |
Actions (login required)
 |
View Item |
