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Quantum plasmon and Rashba-like spin splitting in self-assembled CoxC60 composites with enhanced Co content (x > 15)
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SYSNO ASEP 0488726 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Quantum plasmon and Rashba-like spin splitting in self-assembled CoxC60 composites with enhanced Co content (x > 15) Author(s) Lavrentev, Vasyl (UJF-V) RID, ORCID, SAI
Chvostová, Dagmar (FZU-D) RID, SAI, ORCID
Stupakov, Alexandr (FZU-D) RID, ORCID
Lavrenteva, Inna (UJF-V) ORCID
Vacík, Jiří (UJF-V) RID, ORCID, SAI
Motylenko, M. (DE)
Barchuk, M. (CZ)
Rafaja, D. (DE)
Dejneka, Alexandr (FZU-D) RID, ORCIDNumber of authors 9 Article number 135701 Source Title Nanotechnology. - : Institute of Physics Publishing - ISSN 0957-4484
Roč. 29, č. 13 (2018)Number of pages 9 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords fullerene ; nanocomposites ; quantum plasmon ; optical spectra ; energy band splitting Subject RIV BG - Nuclear, Atomic and Molecular Physics, Colliders OECD category Nano-materials (production and properties) Subject RIV - cooperation Institute of Physics - Solid Matter Physics ; Magnetism R&D Projects GBP108/12/G108 GA ČR - Czech Science Foundation (CSF) LM2015088 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2015056 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UJF-V - RVO:61389005 ; FZU-D - RVO:68378271 UT WOS 000424926700001 EID SCOPUS 85042311151 DOI https://doi.org/10.1088/1361-6528/aaaa7a Annotation Driving by interplay between plasmonic and magnetic effects in organic composite semiconductors is a challenging task with a huge potential for practical applications. Here, we present evidence of a quantum plasmon excited in the self-assembled CoxC60 nanocomposite films with x > 15 (interval of the Co cluster coalescence) and analyse it using the optical absorption (OA) spectra. In the case of CoxC60 film with x = 16 (LF sample), the quantum plasmon generated by the Co/CoO clusters is found as the 1.5 eV-centred OA peak. This finding is supported by the establishment of four specific C-60-related OA lines detected at the photon energies E-p > 2.5 eV. Increase of the Co content up to x = 29 (HF sample) leads to pronounced enhancement of OA intensity in the energy range of E-p > 2.5 eV and to plasmonic peak downshift of 0.2 eV with respect to the peak position in the LF spectrum. Four pairs of the OA peaks evaluated in the HF spectrum at E-p > 2.5 eV reflect splitting of the C-60-related lines, suggesting great change in the microscopic conditions with increasing x. Analysis of the film nanostructure and the plasmon-induced conditions allows us to propose a Rashba-like spin splitting effect that suggests valuable sources for spin polarization. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2019
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