Effect of Dangling Bond Spins on the Dark Exciton Recombination and Spin Polarization in CdSe Colloidal Nanostructures

  • A. V. Rodina
  • A. A. Golovatenko
  • E. V. Shornikova
  • D. R. Yakovlev
  • Al. L. Efros
Topical Collection: 18th International Conference on II-VI Compounds
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Part of the following topical collections:
  1. 18th International Conference on II-VI Compounds and Related Materials

Abstract

We present theoretical aspects of the exchange interaction between the ground optically-forbidden “dark” exciton state and surface dangling bonds in colloidal CdSe spherical nanocrystals and nanoplatelets. The influence of the dangling bond spins on the radiative recombination and spin splitting of the dark exciton is shown. Processes of optically-driven and external magnetic field-driven formation of the dangling bond magnetic polaron (DBMP) are considered. Thermodynamic and dynamic polarization mechanisms of the DBMP formation within these two processes and corresponding critical temperatures are compared. Experimental manifestations of the DBMP formation in CdSe nanocrystals and nanoplatelets are discussed.

Keywords

Colloidal nanostructures CdSe nanoplatelets CdSe nanocrystals dangling bonds magnetic polaron 

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Notes

Acknowledgements

This work has been supported in part by the Government of Russia (Project No. 14.Z50.31.0021, leading scientist M. Bayer), by the Russian Foundation for Basic Researches (Grant No. 17-02-01063), and by the Deutsche Forschungsgemeinschaft in the frame of ICRC TRR 160.

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Copyright information

© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  1. 1.Ioffe InstituteRussian Academy of SciencesSt. PetersburgRussia
  2. 2.Experimentelle Physik 2Technische Universität DortmundDortmundGermany
  3. 3.Rzhanov Institute of Semiconductor PhysicsSiberian Branch of Russian Academy of SciencesNovosibirskRussia
  4. 4.Naval Research LaboratoryWashingtonUSA

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