Optical orientation and alignment of excitons in ensembles of inorganic perovskite nanocrystals

@article{Nestoklon2018OpticalOA,
  title={Optical orientation and alignment of excitons in ensembles of inorganic perovskite nanocrystals},
  author={Mikhail O. Nestoklon and Serguei V. Goupalov and R. I. Dzhioev and O. S. Ken and Vladimir L. Korenev and Yu. G. Kusrayev and V. F. Sapega and Chris de Weerd and Leyre Gomez and Tom Gregorkiewicz and Junhao Lin and Kazu Suenaga and Yasufumi Fujiwara and Lev B. Matyushkin and Irina N Yassievich},
  journal={Physical Review B},
  year={2018}
}
We demonstrate the optical orientation and alignment of excitons in a two-dimensional layer of CsPbI3 perovskite nanocrystals prepared by colloidal synthesis and measure the anisotropic exchange splitting of exciton levels in the nanocrystals. From the experimental data at low temperature (2 K), we obtain the average value of anisotropic splitting of bright exciton states of the order of 120 μeV. Our calculations demonstrate that there is a significant contribution to the splitting due to the… 

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