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Updated: Aug 16, 2025

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Published on: June 28, 2018
Coherent Spin Dynamics of Electrons in Two-Dimensional (PEA)2PbI4 Perovskites
Erik Kirstein1, Evgeny A Zhukov1,2, Dmitri R Yakovlev1,2
1Experimental Physics 2, Department of Physics, TU Dortmund, 44227 Dortmund, Germany.
Abstract:
The versatile potential of lead halide perovskites and two-dimensional materials is merged in the Ruddlesden-Popper perovskites having outstanding optical properties. Here, the coherent spin dynamics in Ruddlesden-Popper (PEA)2PbI4 perovskites is 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 μs. 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 of +1.6 is measured 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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