Infrared reflectivity and lattice fundamentals in anataseTiO2s

Autor:	Helmuth Berger, Richard Zallen, Reinaldo J. Gonzalez
Rok vydání:	1997
Předmět:	Anatase Materials science Condensed matter physics business.industry Phonon Dielectric dispersion Infrared reflectivity Reflectivity Condensed Matter::Materials Science Optics Rutile Lattice (order) Longitudinal optical business
Zdroj:	Physical Review B. 55:7014-7017
ISSN:	1095-3795 0163-1829
DOI:	10.1103/physrevb.55.7014
Popis:	Polarization-dependent far-infrared reflectivity measurements were carried out on single crystals of anatase ${\mathrm{TiO}}_{2}$ . The results were analyzed to yield the dielectric dispersion properties of anatase in the lattice fundamentals regime. The frequencies (in ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$ ) of the transverse optical (TO) and longitudinal optical (LO) zone-center phonons were determined to be 367(755) for the TO (LO) of the ${\mathrm{A}}_{2\mathrm{u}}$ mode, 262(366) and 435(876) for the ${\mathrm{E}}_{\mathrm{u}}$ modes. The large TO-LO splittings were used to estimate effective charges.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7323e61ba63bd3ebb27b3c8513179a5f https://doi.org/10.1103/physrevb.55.7014 Zobrazit plný text záznamu