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17 September 2018 Carrier spin relaxation in 2D perovskite semiconductors (Conference Presentation)
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Interest in the hybrid organic-inorganic perovskite semiconductors has skyrocketed in recent years due to unprecedented high performance as solution-processable absorber layers in solar cells [1]. These materials also have potential for applications in semiconductor spintronics due to their large spin-orbit interaction. Theoretical studies predict a large Rashba spin splitting [2], and recent experiments have revealed a large photoinduced magnetization [3-5] and spin-dependent optical Stark effect [6], yet still relatively little is known about the spin-related properties of these materials. Here we report polarization-dependent pump probe studies of the 2D perovskite butylammonium methylammonium lead iodide. Our experiments indicate a strong influence of the Rashba spin splitting on the carrier kinetics in this system, consistent with our recent four-wave mixing studies of bulk CH3NH3PbI3. [1] [2] M. Kepenekian and J. Even, J. Phys. Chem. Lett. 8, 3362 (2017). [3] D. Giovanni et al. Nano Lett. 15, 1553 (2015). [4] C. Zhang et al. Nat. Phys. 11, 427 (2015). [5] P. Odenthal et al. Nat. Phys. 13, 894 (2017). [6] D. Giovanni et al. Science Advances 2, e1600477 (2016).
Conference Presentation
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Kimberley C. Hall, Seth B. Todd, Drew B. Riley, Ajan Ramachandran, Charlotte Clegg, Ali Binai-Motlagh, Constantinos C. Stoumpos, Samuel A. March, Ian G. Hill, and Mercouri G. Kanatzidis "Carrier spin relaxation in 2D perovskite semiconductors (Conference Presentation)", Proc. SPIE 10724, Physical Chemistry of Semiconductor Materials and Interfaces XVII, 107240J (17 September 2018);

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