Magneto-Optics of Excitons Interacting with Magnetic Ions in CdSe/CdMnS Colloidal Nanoplatelets
| Autor: | Savas Delikanli, Sushant Shendre, Dmitri R. Yakovlev, Yuri G. Kusrayev, A. A. Golovatenko, Victor F. Sapega, I. V. Kalitukha, D. Kudlacik, Manfred Bayer, Elena V. Shornikova, Danil O Tolmachev, Vitalii Yu. Ivanov, Hilmi Volkan Demir |
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| Přispěvatelé: | Delikanlı, Savaş, Demir, Hilmi Volkan, School of Electrical and Electronic Engineering, School of Physical and Mathematical Sciences, LUMINOUS! Centre of Excellence for Semiconductor Lighting & Displays |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Photoluminescence Exciton CdSe nanoplatelet General Physics and Astronomy FOS: Physical sciences 02 engineering and technology 010402 general chemistry 01 natural sciences Ion Spin-flip Raman scattering symbols.namesake Condensed Matter::Materials Science Physics [Science] Mesoscale and Nanoscale Physics (cond-mat.mes-hall) General Materials Science Ions Optically detected magnetic resonance Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Exchange interaction Relaxation (NMR) General Engineering Magnetic semiconductor 021001 nanoscience & nanotechnology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 0104 chemical sciences Magnetic field Colloidal nanocrystals symbols Diluted magnetic semiconductors Excitons Magneto-optics 0210 nano-technology Raman scattering |
| Zdroj: | ACS Nano |
| ISSN: | 1936-086X |
| Popis: | Excitons in diluted magnetic semiconductors represent excellent probes for studying the magnetic properties of these materials. Various magneto-optical effects, which depend sensitively on the exchange interaction of the excitons with the localized spins of the magnetic ions can be used for probing. Here, we study core/shell CdSe/(Cd,Mn)S colloidal nanoplatelets hosting diluted magnetic semiconductor layers. The inclusion of the magnetic Mn2+ ions is evidenced by three magneto-optical techniques using high magnetic fields up to 15 T: polarized photoluminescence, optically detected magnetic resonance, and spin-flip Raman scattering. We show that the holes in the excitons play the dominant role in exchange interaction with magnetic ions. We suggest and test an approach for evaluation of the Mn2+ concentration based on the spin-lattice relaxation dynamics of the Mn2+ spin system. National Research Foundation (NRF) Accepted version This work was supported by the Deutsche Forschungsgemeinschaft through the International Collaborative Research Center TRR 160 (Projects B1, B2, and C7) and by the Russian Foundation for Basic Research (Grant No. 19- 52-12064 NNIO-a). D.R.Y. acknowledges the partial support of the Russian Science Foundation (Project No. 20-42-01008). S.S., S.D. and H.V.D. acknowledge partial support from the Singapore National Research Foundation under NRF–NRFI2016–08. A.A.G. acknowledges support of the Grants Council of the President of the Russian Federation. V.Yu.I. acknowledges support of the Polish National Science Center (Grant No. 2018/30/M/ST3/00276). H.V.D. gratefully acknowledges support from TUBA. |
| Databáze: | OpenAIRE |
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