We present a combined experimental and theoretical analysis of the dielectric and vibrational properties of crystalline lutetium oxide in its ground-state bixbyite structure. The vibrational dielectric function of Lu2O3 thin films grown by atomic-layer deposition was studied by infrared transmission and reflection-absorption spectroscopies, selectively accessing transverse and longitudinal optical frequencies. The static dielectric constant is extracted analyzing the infrared response. We also present first-principles density-functional linear-response calculations, which are in close agreement with experiment, and provide insight into the microscopic nature of vibrational spectra and dielectric properties.
|Titolo:||Dielectric properties of high-kappa oxides: Theory and experiment for Lu2O3|
|Autori:||Bonera E; Scarel G; Fanciulli M; Delugas P; Fiorentini V|
|Rivista:||PHYSICAL REVIEW LETTERS|
|Data di pubblicazione:||2005|
|Digital Object Identifier (DOI):||10.1103/PhysRevLett.94.027602|
|Appare nelle tipologie:||1.1 Journal article|