Strain splitting of1syellow orthoexciton of epitaxial orthorhombicCu2Ofilms on MgO [110]

Autor:	Jianhua Chen, Robert P. H. Chang, Kirill Rivkin, John B Ketterson, Yi Sun, P. R. Markworth
Rok vydání:	2002
Předmět:	Diffraction Photoluminescence Materials science business.industry Phonon Oxide Epitaxy Molecular physics Condensed Matter::Materials Science chemistry.chemical_compound Optics chemistry Lattice (order) Orthorhombic crystal system business Recombination
Zdroj:	Physical Review B. 66
ISSN:	1095-3795 0163-1829
Popis:	We investigated the optical properties of epitaxial orthorhomic cuprous oxide films grown on MgO@110#. Absorption measurements show clear excitonic peaks up to n55p. Photoluminescence at 2 K shows several sharp emission peaks in the vicinity of 610 nm associated with a splitting of various 1 s orthoexciton energy levels. The evolution of the peaks with temperature indicates that three peaks at higher energy are due to direct recombination of 1s yellow orthoexcitons and three corresponding peaks at lower energy are their phonon replicas. The symmetry of each level is identified by the polarization properties of their photoluminescence emissions. The observed splitting of the energy levels is used to calculate the coherency strain based on an earlier-parametrized theory for the level splitting by Waters et al. based on the known symmetry of the electronic states. This predicted strain is compared with that determined by x-ray diffraction measurements of the measured lattice parameters.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5348619b266bd788ccf6cb176f501197 https://doi.org/10.1103/physrevb.66.245315 Zobrazit plný text záznamu