Hyperfine interaction dominates the fine structure of triplet indirect excitons with small exchange splitting in CsPbI3 perovskite nanocrystals.
Hyperfine interaction of electrons and holes with nuclei probed by optical orientation in MAPbI$_3$ perovskite crystals
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abstract
Optical orientation of electron and hole spins by circularly polarized light is investigated for MAPbI$_3$ single crystals. The Hanle and polarization recovery effects measured in transverse and longitudinal magnetic fields, respectively, evidence the hyperfine interaction with nuclear spins as the main factor determining the spin dynamics of charge carriers at cryogenic temperatures. The parameters of the nuclear spin fluctuations within the carrier localization volume are evaluated. Dynamic polarization of the nuclear spins is demonstrated by the Overhauser field reaching 5 mT for acting on the electrons and -30 mT for acting on the holes.
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cond-mat.mes-hall 2years
2026 2verdicts
UNVERDICTED 2representative citing papers
Mixed-cation MAxFA1-xPbI3 perovskite crystals host multiple electron and hole spin subensembles with T1 times up to 2 ms at cryogenic temperatures, limited by nuclear Overhauser fields.
citing papers explorer
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Hyperfine versus exchange interaction in the spin dynamics of spatially indirect excitons in CsPbI$_{3}$ perovskite nanocrystals
Hyperfine interaction dominates the fine structure of triplet indirect excitons with small exchange splitting in CsPbI3 perovskite nanocrystals.
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Millisecond spin relaxation times of distinct electron and hole subensembles in MA$_x$FA$_{1-x}$PbI$_3$ perovskite crystals
Mixed-cation MAxFA1-xPbI3 perovskite crystals host multiple electron and hole spin subensembles with T1 times up to 2 ms at cryogenic temperatures, limited by nuclear Overhauser fields.