Persuasive Evidence for Electron–Nuclear Coupling in Diluted Magnetic Colloidal Nanoplatelets Using Optically Detected Magnetic Resonance Spectroscopy
| Autor: | Yahel Barak, Georgy I. Maikov, Alyssa Kostadinov, Rotem Strassberg, Efrat Lifshitz, Savas Delikanli, Manoj K. Sharma, Pedro Ludwig Hernandez-Martinez, Hilmi Volkan Demir, Joanna Dehnel |
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| Přispěvatelé: | Delikanlı, Savaş, Sharma, Manoj, Demir, Hilmi Volkan, School of Electrical and Electronic Engineering, School of Physical and Mathematical Sciences, The Photonics Institute, Centre of Excellence for Semiconductor Lighting and Displays |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Resonance structures Colloidal Semiconductors 02 engineering and technology Electron 010402 general chemistry Spin-exchange interaction 01 natural sciences Quantum mechanics Condensed Matter::Materials Science Electromagnetic radiation Magnetic properties General Materials Science Physical and Theoretical Chemistry Spin (physics) Spectroscopy Magnetic Dopants Dopant Spins Doping Nuclear magnetic resonance spectroscopy Transition metals 021001 nanoscience & nanotechnology 0104 chemical sciences Chemical physics Electrical and electronic engineering [Engineering] Condensed Matter::Strongly Correlated Electrons 0210 nano-technology |
| Zdroj: | The Journal of Physical Chemistry Letters Journal of Physical Chemistry Letters |
| ISSN: | 1948-7185 |
| DOI: | 10.1021/acs.jpclett.9b01999 |
| Popis: | The incorporation of magnetic impurities into semiconductor nanocrystals with size confinement promotes enhanced spin exchange interaction between photogenerated carriers and the guest spins. This interaction stimulates new magneto-optical properties with significant advantages for emerging spin-based technologies. Here we observe and elaborate on carrier-guest interactions in magnetically doped colloidal nanoplatelets with the chemical formula CdSe/Cd1-xMn x S, explored by optically detected magnetic resonance and magneto-photoluminescence spectroscopy. The host matrix, with a quasi-type II electronic configuration, introduces a dominant interaction between a photogenerated electron and a magnetic dopant. Furthermore, the data convincingly presents the interaction between an electron and nuclear spins of the doped ions located at neighboring surroundings, with consequent influence on the carrier's spin relaxation time. The nuclear spin contribution by the magnetic dopants in colloidal nanoplatelets is considered here for the first time. NRF (Natl Research Foundation, S’pore) Accepted version |
| Databáze: | OpenAIRE |
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