Research output: Contribution to journal › Article › peer-review
Temperature dependence of the electron and hole Landé g-factors in CsPbI3 nanocrystals in a glass matrix. / Кузнецова, Мария Сергеевна; Zhukov, Evgenii; Belykh, Vasilii; Nestoklon, M. O.; Колобкова, Елена; Yakovlev, Dmitrii; Bayer, Manfred; Меляков, Сергей.
In: Nanoscale, 11.10.2024.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Temperature dependence of the electron and hole Landé g-factors in CsPbI3 nanocrystals in a glass matrix
AU - Кузнецова, Мария Сергеевна
AU - Zhukov, Evgenii
AU - Belykh, Vasilii
AU - Nestoklon, M. O.
AU - Колобкова, Елена
AU - Yakovlev, Dmitrii
AU - Bayer, Manfred
AU - Меляков, Сергей
PY - 2024/10/11
Y1 - 2024/10/11
N2 - 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 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 a 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 a result of NC size reduction, and also with increasing temperature. The hole g-factor shows the opposite trend. 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.
AB - 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 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 a 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 a result of NC size reduction, and also with increasing temperature. The hole g-factor shows the opposite trend. 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.
UR - https://pubs.rsc.org/en/content/articlelanding/2024/nr/d4nr03132f
M3 - Article
JO - Nanoscale
JF - Nanoscale
SN - 2040-3364
ER -
ID: 127412830