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Rare earth functionalization effect in optical response of ZnO nano clusters
HPT Arts & RYK Sci Coll, Dept Phys, Nasik 422005, Maharashtra, India..
HPT Arts & RYK Sci Coll, Dept Phys, Nasik 422005, Maharashtra, India..
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
Dongguk Univ, Dept Phys, Seoul 100715, South Korea..
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2016 (English)In: European Physical Journal D: Atomic, Molecular and Optical Physics, ISSN 1434-6060, E-ISSN 1434-6079, Vol. 70, no 3, 63Article in journal (Refereed) PublishedText
Abstract [en]

The electronic structure of rare earth (RE) doped Zn12O12 clusters - namely, REZn11O12 and RE2Zn10O12 with RE = Nd, Eu and Gd have been investigated within the framework of density functional theory formalism. Doping of a RE atom is found to be energetically favorable in this zinc oxide cluster. We have found that the cage structure of the host cluster Zn12O12 does not change significantly by the substitutional doping of a RE atom on Zn sites. The magnetic coupling between RE ions in the host cluster is found to be ferromagnetic. The static polarizabilities and optical properties of the RE doped Zn12O12 clusters have been studied based on the time dependent density functional theory. With RE doping, the polarizability increases as compared to that of the host cluster. The analysis of the optical absorption spectra indicate that the f electrons in RE doped clusters are significantly more involved in low-energy transitions. For Eu doped clusters give rise to more quenched oscillator strengths as compared to that of Nd and Gd doped zinc oxide clusters. With the increase in number of RE atoms, the red shift is observed in the optical spectrum of the zinc oxide cluster.

Place, publisher, year, edition, pages
2016. Vol. 70, no 3, 63
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-294310DOI: 10.1140/epjd/e2016-60314-8ISI: 000373091300004OAI: oai:DiVA.org:uu-294310DiVA: diva2:930717
Funder
Carl Tryggers foundation Swedish Research CouncilSwedish Energy Agency
Available from: 2016-05-25 Created: 2016-05-18 Last updated: 2016-05-25Bibliographically approved

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Chakraborty, SudipAhuja, Rajeev
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Materials Theory
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