Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Coherent Spin Dynamics of Electrons and Holes in CsPbBr3Colloidal Nanocrystals. / Grigoryev, Philipp S.; Belykh, Vasilii V.; Yakovlev, Dmitri R.; Lhuillier, Emmanuel; Bayer, Manfred.
в: Nano Letters, Том 21, № 19, 30.09.2021, стр. 8481-8487.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Coherent Spin Dynamics of Electrons and Holes in CsPbBr3Colloidal Nanocrystals
AU - Grigoryev, Philipp S.
AU - Belykh, Vasilii V.
AU - Yakovlev, Dmitri R.
AU - Lhuillier, Emmanuel
AU - Bayer, Manfred
N1 - Publisher Copyright: © 2021 American Chemical Society.
PY - 2021/9/30
Y1 - 2021/9/30
N2 - The spin dynamics in CsPbBr3 lead halide perovskite nanocrystals are studied by picosecond pump-probe Faraday rotation in an external magnetic field. Coherent Larmor precession of electrons and holes with spin dephasing times of ∼600 ps is detected in a transversal magnetic field. The longitudinal spin relaxation time in weak magnetic fields reaches 80 ns at a temperature of 5 K. In this regime, the carrier spin dynamics is governed by nuclear spin fluctuations characterized by an effective hyperfine field strength of 25 mT. The Landé factors determining the carrier Zeeman splittings are ge = +1.73 for electrons and gh = +0.83 for holes. A comparison with a CsPbBr3 polycrystalline film and bulk single crystals evidences that the spatial confinement of electrons and holes in the nanocrystals only slightly affects their g factors and spin dynamics.
AB - The spin dynamics in CsPbBr3 lead halide perovskite nanocrystals are studied by picosecond pump-probe Faraday rotation in an external magnetic field. Coherent Larmor precession of electrons and holes with spin dephasing times of ∼600 ps is detected in a transversal magnetic field. The longitudinal spin relaxation time in weak magnetic fields reaches 80 ns at a temperature of 5 K. In this regime, the carrier spin dynamics is governed by nuclear spin fluctuations characterized by an effective hyperfine field strength of 25 mT. The Landé factors determining the carrier Zeeman splittings are ge = +1.73 for electrons and gh = +0.83 for holes. A comparison with a CsPbBr3 polycrystalline film and bulk single crystals evidences that the spatial confinement of electrons and holes in the nanocrystals only slightly affects their g factors and spin dynamics.
KW - coherent spin dynamics
KW - CsPbBr
KW - electron and hole g-factors
KW - Perovskite nanocrystals
KW - pump-probe time-resolved Faraday rotation
KW - ROOM-TEMPERATURE
KW - CsPbBr3
KW - EMISSION
KW - PEROVSKITE NANOCRYSTALS
KW - EXCITONS
UR - http://www.scopus.com/inward/record.url?scp=85117129978&partnerID=8YFLogxK
U2 - 10.1021/acs.nanolett.1c03292
DO - 10.1021/acs.nanolett.1c03292
M3 - Article
AN - SCOPUS:85117129978
VL - 21
SP - 8481
EP - 8487
JO - Nano Letters
JF - Nano Letters
SN - 1530-6984
IS - 19
ER -
ID: 87929578