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28 September 2023 Extended spin lifetimes in transition metal doped hybrid lead halide perovskites
Jonathan Zerhoch, Stanislav Bodnar, Shangpu Liu, Markus Heindl, Felix Deschler
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Proceedings Volume PC12656, Spintronics XVI; PC126560Y (2023) https://doi.org/10.1117/12.2677502
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States
Abstract
The outstanding optoelectronic properties of hybrid metal halide perovskites, and their strong spin-orbit coupling, enable efficient manipulation of the charge carrier’s angular momentum. In this work, we investigate the dominant spin relaxation mechanism in CH3NH3PbBr3 films with doping levels up to 50% with the transition metal Mn2+. We investigate the spin relaxation times in these paramagnetic hybrid semiconductors with ultrafast circularly polarized broadband transient absorption spectroscopy at cryogenic temperatures. We report extended spin relaxation lifetimes by a factor of three which we explain with motional narrowing effects in the paramagnetic ensemble of Mn2+ impurities. Our work now presents paramagnetic doping of hybrid semiconductors as a promising concept for quantum technologies and spintronic devices.
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Jonathan Zerhoch, Stanislav Bodnar, Shangpu Liu, Markus Heindl, and Felix Deschler "Extended spin lifetimes in transition metal doped hybrid lead halide perovskites", Proc. SPIE PC12656, Spintronics XVI, PC126560Y (28 September 2023); https://doi.org/10.1117/12.2677502
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KEYWORDS
Perovskite
Transition metals
Lead
Cryogenics
Doping
Spin dynamics
Picosecond phenomena
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