Enhanced Spin Coherence of a Self-Assembled Quantum Dot Molecule at the Optimal Electrical Bias
| العنوان: | Enhanced Spin Coherence of a Self-Assembled Quantum Dot Molecule at the Optimal Electrical Bias |
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| المؤلفون: | Kha X. Tran, Allan S. Bracker, Michael K. Yakes, Joel Q. Grim, Samuel G. Carter |
| المصدر: | Physical Review Letters. 129 |
| بيانات النشر: | American Physical Society (APS), 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | General Physics and Astronomy |
| الوصف: | A pair of coupled dots with one electron in each dot can provide improvements in spin coherence, particularly at an electrical bias called the "sweet spot," but few measurements have been performed on self-assembled dots in this regime. Here, we directly measure the T_{2}^{*} coherence time of the singlet-triplet states in this system as a function of bias and magnetic field, obtaining a maximum T_{2}^{*} of 60 ns, more than an order of magnitude higher than an electron spin in a single quantum dot. Our results uncover two main dephasing mechanisms: electrical noise away from the sweet spot, and a magnetic field dependent interaction with nuclear spins due to a difference in g factors. |
| تدمد: | 1079-7114 0031-9007 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::409ce3292c8f310be9fa23e4e042b4d4 https://doi.org/10.1103/physrevlett.129.027403 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi.dedup.....409ce3292c8f310be9fa23e4e042b4d4 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10797114 00319007 |
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