التفاصيل البيبلوغرافية
| العنوان: |
Hyperfine-Induced Electron-Spin Dephasing in Negatively Charged Colloidal Quantum Dots: A Survey of Size Dependence |
| المؤلفون: |
Yuanyuan Zhang (101797), Meizhen Jiang (10190214), Zhen Wu (358187), Qing Yang (67856), Yumeng Men (11478122), Lin Cheng (107461), Pan Liang (4996796), Rongrong Hu (1423408), Tianqing Jia (1347393), Zhenrong Sun (1347396), Donghai Feng (1347390) |
| سنة النشر: |
2021 |
| المجموعة: |
Smithsonian Institution: Digital Repository |
| مصطلحات موضوعية: |
Biophysics, Biochemistry, Physiology, Pharmacology, Biotechnology, Ecology, Inorganic Chemistry, Computational Biology, Physical Sciences not elsewhere classified, weak magnetic fields, semiconductor quantum dots, resolved ellipticity spectroscopy, negatively photocharged cdse, measurements also show, independent time component, electron spin dynamics, electron spin dephasings, dependent dephasing time, spin dephasing, photodoped electron, induced electron, room temperature, measured samples, likely due, directly proportional, better understand, >< sup |
| الوصف: |
The electron spin relaxation processes are complicated in semiconductor quantum dots. Different spin relaxation mechanisms may result in an increased or decreased spin relaxation rate with the size. The information on size-dependent spin dynamics helps to clarify and better understand the underlying spin relaxation processes. We investigate the size dependence of the electron spin dynamics in negatively photocharged CdSe and CdS colloidal quantum dots by time-resolved ellipticity spectroscopy. It is revealed that the electron spin dephasings of photodoped electron in zero or weak magnetic fields are dominated by the electron–nuclear hyperfine interaction for all measured samples. The hyperfine-induced electron spin dephasing time is ∼1–2 ns at room temperature and decreases with decreasing the size D . In addition to a size-dependent dephasing time that is directly proportional to D 3/2 , our measurements also show a size-independent time component, likely due to the laser-induced nuclear spin ordering. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| العلاقة: |
https://figshare.com/articles/journal_contribution/Hyperfine-Induced_Electron-Spin_Dephasing_in_Negatively_Charged_Colloidal_Quantum_Dots_A_Survey_of_Size_Dependence/16677758Test |
| DOI: |
10.1021/acs.jpclett.1c02754.s001 |
| الإتاحة: |
https://doi.org/10.1021/acs.jpclett.1c02754.s001Test |
| حقوق: |
CC BY-NC 4.0 |
| رقم الانضمام: |
edsbas.408DDA3A |
| قاعدة البيانات: |
BASE |
