Mode locking of hole spin coherences in CsPb(Cl, Br) 3 perovskite nanocrystals.

Autor: Kirstein E; Experimentelle Physik 2, Technische Universität Dortmund, 44227, Dortmund, Germany. erik.kirstein@tu-dortmund.de., Kopteva NE; Experimentelle Physik 2, Technische Universität Dortmund, 44227, Dortmund, Germany., Yakovlev DR; Experimentelle Physik 2, Technische Universität Dortmund, 44227, Dortmund, Germany. dmitri.yakovlev@tu-dortmund.de.; Ioffe Institute, Russian Academy of Sciences, 194021, St. Petersburg, Russia. dmitri.yakovlev@tu-dortmund.de.; P. N. Lebedev Physical Institute of the Russian Academy of Sciences, 119991, Moscow, Russia. dmitri.yakovlev@tu-dortmund.de., Zhukov EA; Experimentelle Physik 2, Technische Universität Dortmund, 44227, Dortmund, Germany.; Ioffe Institute, Russian Academy of Sciences, 194021, St. Petersburg, Russia., Kolobkova EV; ITMO University, 199034, St. Petersburg, Russia.; St. Petersburg State Institute of Technology, 190013, St. Petersburg, Russia., Kuznetsova MS; Spin Optics Laboratory, St. Petersburg State University, 198504, St. Petersburg, Russia., Belykh VV; P. N. Lebedev Physical Institute of the Russian Academy of Sciences, 119991, Moscow, Russia., Yugova IA; Spin Optics Laboratory, St. Petersburg State University, 198504, St. Petersburg, Russia., Glazov MM; Ioffe Institute, Russian Academy of Sciences, 194021, St. Petersburg, Russia., Bayer M; Experimentelle Physik 2, Technische Universität Dortmund, 44227, Dortmund, Germany., Greilich A; Experimentelle Physik 2, Technische Universität Dortmund, 44227, Dortmund, Germany.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2023 Feb 08; Vol. 14 (1), pp. 699. Date of Electronic Publication: 2023 Feb 08.
DOI: 10.1038/s41467-023-36165-0
Abstrakt: The spin physics of perovskite nanocrystals with confined electrons or holes is attracting increasing attention, both for fundamental studies and spintronic applications. Here, stable [Formula: see text] lead halide perovskite nanocrystals embedded in a fluorophosphate glass matrix are studied by time-resolved optical spectroscopy to unravel the coherent spin dynamics of holes and their interaction with nuclear spins of the 207 Pb isotope. We demonstrate the spin mode locking effect provided by the synchronization of the Larmor precession of single hole spins in each nanocrystal in the ensemble that are excited periodically by a laser in an external magnetic field. The mode locking is enhanced by nuclei-induced frequency focusing. An ensemble spin dephasing time [Formula: see text] of a nanosecond and a single hole spin coherence time of T 2  = 13 ns are measured. The developed theoretical model accounting for the mode locking and nuclear focusing for randomly oriented nanocrystals with perovskite band structure describes the experimental data very well.
(© 2023. The Author(s).)
Databáze: MEDLINE
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