Optical spectroscopy and unusual temperature shift of f - f zero-phonon luminescence lines: KTaO.sub.3./sub.:Er

0558820 - FZÚ 2023 RIV GB eng J - Journal Article
Trepakov, V. A. - Skvortsov, A. P. - Potůček, Zdeněk - Bryknar, Z. - Nuzhnyy, Dmitry - Laguta, Valentyn - Kuznetsov, V.G. - Gavrikov, A.A. - Dejneka, Alexandr
Optical spectroscopy and unusual temperature shift of f - f zero-phonon luminescence lines: KTaO₃:Er.
Ferroelectrics. Roč. 591, č. 1 (2022), s. 191-200. ISSN 0015-0193. E-ISSN 1563-5112
R&D Projects: GA MŠMT(CZ) EF16_019/0000760
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : ABO₃ * incipient ferroelectrics * rare-earth impurities * zero-phonon emission lines
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 0.8, year: 2022
Method of publishing: Limited access
https://doi.org/10.1080/00150193.2022.2041938

We present a study of KTaO3:Er (~0.05%) single crystals based on a multifaceted approach including the use of optical absorption, far-infrared reflectivity, electron paramagnetic resonance, photoluminescence spectra, and ab initio simulations. We describe briefly the fundamental consequences of Er doping, in particular, stiffening of TO1 soft mode of KTaO3. We provide information about energy level structures controlling f – f optical transitions in Er3+, on formation of minor cubic octahedral and major orthorhombic Er3+ centers. It is revealed that the temperature shift of narrow zero-phonon emission lines is strikingly unusual being much larger than that typical for trivalent rare-earth impurities.

Permanent Link: https://hdl.handle.net/11104/0334998