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Optical evidence of strong coupling between valence-band holes and d-localized spins in Zn.sub.1-x./sub.Mn.sub.x./sub.O
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SYSNO ASEP 0345680 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Optical evidence of strong coupling between valence-band holes and d-localized spins in Zn1-xMnxO Author(s) Sokolov, V.I. (RU)
Druzhinin, A.V. (RU)
Gruzdev, N.B. (RU)
Dejneka, Alexandr (FZU-D) RID, ORCID
Churpita, Olexandr (FZU-D) RID, ORCID
Hubička, Zdeněk (FZU-D) RID, ORCID, SAI
Jastrabík, Lubomír (FZU-D) RID, ORCID
Trepakov, Vladimír (FZU-D) RIDSource Title Physical Review. B - ISSN 1098-0121
Roč. 81, č. 15 (2010), 153104/1-153104/4Number of pages 4 s. Language eng - English Country US - United States Keywords Zn1-xMnxO thin films ; absorption edge ; localized Zhang-Rice-type state into the band gap Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GC202/09/J017 GA ČR - Czech Science Foundation (CSF) KJB100100703 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) KAN301370701 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) 1M06002 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z10100522 - FZU-D (2005-2011) UT WOS 000277210500004 DOI 10.1103/PhysRevB.81.153104 Annotation We report on optical-absorption study of Zn1-xMnxO (x=0–0.06) films on fused silica substrates taking special attention to the spectral range of the fundamental absorption edge (3.1–4 eV). Well-pronounced excitonic lines observed in the region 3.40–3.45 eV were found to shift to higher energies with increasing Mn concentration. The optical band-gap energy increases with x too, reliably evidencing strong coupling between oxygen holes and localized spins of manganese ions. In the 3.1–3.3 eV region the optical-absorption curve in the manganese-contained films was found to shift to lower energies with respect to that for undoped ZnO. The additional absorption observed in this range is interpreted as a result of splitting of a localized Zhang-Rice-type state into the band gap. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2011
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