Coherent spin dynamics of electrons and holes in CsPbBr3 perovskite crystals

Vasilii V. Belykh, Dmitri R. Yakovlev, Mikhail M. Glazov, Philipp S. Grigoryev, Mujtaba Hussain, Janina Rautert, Dmitry N. Dirin, Maksym V. Kovalenko, and Manfred Bayer

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Oct 22, 2018
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Received Date: 12th October 18

The lead halide perovskites demonstrate huge potential for optoelectronic applications, high energy radiation detectors, light emitting devices and solar energy harvesting. Those materials exhibit strong spin-orbit coupling enabling efficient optical orientation of carrier spins in perovskite-based devices with performance controlled by a magnetic field. Here we show that elaborated time-resolved spectroscopy involving strong magnetic fields can be successfully used for perovskites. We perform a comprehensive study of high-quality CsPbBr3 crystals by measuring the exciton and charge carrier g-factors, spin relaxation times and hyperfine interaction of carrier and nuclear spins by means of coherent spin dynamics. Owing to their "inverted" band structure, perovskites represent appealing model systems for semiconductor spintronics exploiting the valence band hole spins, while in conventional semiconductors the conduction band electrons are considered for spin functionality.

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This is an abstract of a preprint hosted on an independent third party site. It has not been peer reviewed but is currently under consideration at Nature Communications.

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