Temperature dependence of the electron and hole Landé g-factors in CsPbI3 nanocrystals in a glass matrix
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arXiv
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| Format: | Preprint |
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2024
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| author | Meliakov, Sergey R. Zhukov, Evgeny A. Belykh, Vasilii V. Nestoklon, Mikhail O. Kolobkova, Elena V. Kuznetsova, Maria S. Bayer, Manfred Yakovlev, Dmitri R. |
| author_facet | Meliakov, Sergey R. Zhukov, Evgeny A. Belykh, Vasilii V. Nestoklon, Mikhail O. Kolobkova, Elena V. Kuznetsova, Maria S. Bayer, Manfred Yakovlev, Dmitri R. |
| contents | The coherent spin dynamics of electrons and holes in CsPbI3 perovskite nanocrystals in a glass matrix are studied by the time-resolved Faraday ellipticity technique in magnetic fields up to 430 mT across a temperature range from 6 K up to 120 K. The Landé g-factors and spin dephasing times are evaluated from the observed Larmor precession of electron and hole spins. The nanocrystal size in the three studied samples varies from about 8 to 16 nm, resulting in exciton transition varying from 1.69 to 1.78 eV at the temperature of 6 K, allowing us to study the corresponding energy dependence of the g-factors. The electron g-factor decreases with increasing confinement energy in the NCs as result of NC size reduction, and also with increasing temperature. The hole g-factor shows the opposite trend. A model analysis shows that the variation of g-factors with NC size arises from the transition energy dependence of the g-factors, which becomes strongly renormalized by temperature. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_21610 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Temperature dependence of the electron and hole Landé g-factors in CsPbI3 nanocrystals in a glass matrix Meliakov, Sergey R. Zhukov, Evgeny A. Belykh, Vasilii V. Nestoklon, Mikhail O. Kolobkova, Elena V. Kuznetsova, Maria S. Bayer, Manfred Yakovlev, Dmitri R. Mesoscale and Nanoscale Physics The coherent spin dynamics of electrons and holes in CsPbI3 perovskite nanocrystals in a glass matrix are studied by the time-resolved Faraday ellipticity technique in magnetic fields up to 430 mT across a temperature range from 6 K up to 120 K. The Landé g-factors and spin dephasing times are evaluated from the observed Larmor precession of electron and hole spins. The nanocrystal size in the three studied samples varies from about 8 to 16 nm, resulting in exciton transition varying from 1.69 to 1.78 eV at the temperature of 6 K, allowing us to study the corresponding energy dependence of the g-factors. The electron g-factor decreases with increasing confinement energy in the NCs as result of NC size reduction, and also with increasing temperature. The hole g-factor shows the opposite trend. A model analysis shows that the variation of g-factors with NC size arises from the transition energy dependence of the g-factors, which becomes strongly renormalized by temperature. |
| title | Temperature dependence of the electron and hole Landé g-factors in CsPbI3 nanocrystals in a glass matrix |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2407.21610 |