Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/92541
Title: Donor DBH excitons and magnetism of Mn doped ZnO
Authors: Sokolov, V. I.
Gruzdev, N. B.
Vazhenin, V. A.
Fokin, A. V.
Korolev, A. V.
Menshenin, V. V.
Surikov, V. T.
Yemelchenko, G. A.
Issue Date: 2019
Publisher: Institute of Physics Publishing
Citation: Donor DBH excitons and magnetism of Mn doped ZnO / V. I. Sokolov, N. B. Gruzdev, V. A. Vazhenin, A. V. Fokin, et al.. — DOI 10.1088/1742-6596/1389/1/012078 // Journal of Physics: Conference Series. — 2019. — Vol. 1. — Iss. 1389. — 12078.
Abstract: In this paper the results of the study of optical absorption, photo-EPR signals and magnetic measurements of hydrothermal single crystals of zinc oxide doped with manganese were presented. Several lines were detected in optical absorption spectra at the temperature of 4.2 K and 77.3 K for σ- and π- polarizations of light in a 1.72-2.3 eV spectral range. These lines are attributed to a donor exciton [(d5 + h)e] that emerges as a result of the Coulomb binding of a free s electron and a hole, which is localized on p-d hybridized states. Properties of these lines are significantly different from the properties of lines of donor and acceptor excitons in II-VI:3d compounds. In EPR-spectra of Zn1-xMnxO crystals the intensity of allowed and forbidden EPR-signals of Mn2+ (d 5)-ions does not change under the illumination while the intensity of EPR-signals of unintentional Fe3+ (d 5)-ions decreases by 70 %. The value of the magnetic susceptibility of Zn1-xMnxO (x = 0.0009) is in linear dependence with temperature, which agrees with the Curie equation. Temperature dependence of the inverse value of the Mn2+ magnetic susceptibility indicates that the exchange interaction in ZnO:Mn crystals is absent. New experimental results allow us to assume that investigated Zn1-xMnxO (x = 0.0009) samples are semiconductors in the forbidden gap of which the donor level of d5/d4 does not exist. The hybridization of d5 states of Mn2+ and p states of the nearest four oxygen ions O2- leads to pushing out the antibonding DBH-states (d 5 + p) into the forbidden gap. The transitions of electrons from DBH-states to the conduction band provide a broad band of the impurity absorption in ZnO:Mn. Below this band we observed a, b, c and d lines, which are called dbh-donor excitons [(d5+h)e]. © Published under licence by IOP Publishing Ltd.
Keywords: CRYSTAL IMPURITIES
ELECTRON SPIN RESONANCE SPECTROSCOPY
EXCITONS
II-VI SEMICONDUCTORS
IONS
LIGHT ABSORPTION
MAGNETIC SUSCEPTIBILITY
MAGNETISM
MANGANESE
MANGANESE COMPOUNDS
SEMICONDUCTING ZINC COMPOUNDS
SINGLE CRYSTALS
TEMPERATURE DISTRIBUTION
WIDE BAND GAP SEMICONDUCTORS
ZINC OXIDE
COULOMB BINDING
DONOR AND ACCEPTOR
FORBIDDEN GAPS
IMPURITY ABSORPTION
LINEAR DEPENDENCE
MN-DOPED ZNO
SPECTRAL RANGE
TEMPERATURE DEPENDENCE
SEMICONDUCTING MANGANESE COMPOUNDS
URI: http://hdl.handle.net/10995/92541
metadata.dc.rights: info:eu-repo/semantics/openAccess
SCOPUS ID: 85076768901
WOS ID: 000562319800078
PURE ID: 11765839
ISSN: 1742-6588
DOI: 10.1088/1742-6596/1389/1/012078
metadata.dc.description.sponsorship: Russian Academy of Medical Sciences, RAMS: 18-10-2-6.
Ministry of Education and Science of the Russian Federation, Minobrnauka
The research was carried out within the state assignment of Minobrnauki of Russia (theme “Magnet” No.АААА-А18-118020290129-5, theme “Electron” No. АААА-А18-118020190098-5) and within the state assignment no. 3.6115.2017/8.9 of the Ministry of Education and Science of the Russian Federation for the Ural Federal University, with the support of the grant of Ural branch of Russian Academy of Science № 18-10-2-6.
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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