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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

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 Zn_1-xMn_xO
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)_RID
Source Title	Physical Review. B - ISSN 1098-0121 Roč. 81, č. 15 (2010), 153104/1-153104/4
Number of pages	4 s.
Language	eng - English
Country	US - United States
Keywords	Zn_1-xMn_xO 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

Number of the records: 1