Effect of Dangling Bond Spins on the Dark Exciton Recombination and Spin Polarization in CdSe Colloidal Nanostructures
| Autor: | Dmitri R. Yakovlev, A. A. Golovatenko, Anna V. Rodina, Elena V. Shornikova, Al. L. Efros |
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| Rok vydání: | 2018 |
| Předmět: |
Quantitative Biology::Biomolecules
Materials science Solid-state physics Spin polarization Spins Condensed matter physics Condensed Matter::Other Exciton Exchange interaction Dangling bond Physics::Optics 02 engineering and technology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Polaron 01 natural sciences 0104 chemical sciences Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Materials Chemistry Spontaneous emission Electrical and Electronic Engineering 0210 nano-technology |
| Zdroj: | Journal of Electronic Materials. 47:4338-4344 |
| ISSN: | 1543-186X 0361-5235 |
| DOI: | 10.1007/s11664-018-6269-7 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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