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arXiv · 2212.02878

Coherent Spin Dynamics of Electrons in Two-Dimensional (PEA)$_2$PbI$_4$ Perovskites

Erik Kirstein·Evgeny A. Zhukov·Dmitri R. Yakovlev·Nataliia E. Kopteva·Carolin Harkort·Dennis Kudlacik·Oleh Hordiichuk·Maksym V. Kovalenko·Manfred Bayer
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Abstract

The versatile potential of lead halide perovskites and two-dimensional materials is merged in the Ruddlesen-Popper perovskites having outstanding optical properties. Here, the coherent spin dynamics in Ruddlesen-Popper (PEA)$_2$PbI$_4$ perovskites are investigated by picosecond pump-probe Kerr rotation in an external magnetic field. The Larmor spin precession of resident electrons with a spin dephasing time of 190~ps is identified. The longitudinal spin relaxation time in weak magnetic fields measured by the spin inertia method is as long as 25~$\mu$s. A significant anisotropy of the electron $g$-factor with the in-plane value of $+2.45$ and out-of-plane value of $+2.05$ is found. The exciton out-of-plane $g$-factor is measured to be of $+1.6$ by magneto-reflectivity. This work contributes to the understanding of the spin-dependent properties of two-dimensional perovskites and their spin dynamics.

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Erik Kirstein, Evgeny A. Zhukov, Dmitri R. Yakovlev, Nataliia E. Kopteva, Carolin Harkort, Dennis Kudlacik, Oleh Hordiichuk, Maksym V. Kovalenko, Manfred Bayer. 2022-12-06. Coherent Spin Dynamics of Electrons in Two-Dimensional (PEA)$_2$PbI$_4$ Perovskites. https://doi.org/10.1021/acs.nanolett.2c03975

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