High resolution electron energy loss spectroscopy of an anisotropic insulator surface: A test for the dielectric theory

作者：M. Liehr, P.A. Thiry, J. J. Pireaux, R. Caudano · 发表于：Journal of Vacuum Science & Technology A Vacuum Surfaces and Films · 年份：1984 · DOI：10.1116/1.572659 · 被引用次数：83 · 研究领域：Electron and X-Ray Spectroscopy Techniques、Semiconductor materials and devices、Ga2O3 and related materials

Electron energy loss measurements were performed on the α-Al2O3(0001) surface at temperatures between 120 and 350 K. Spectra of the Fuchs–Kliewer phonons were recorded with high energy resolution (26 cm−1). Numerical fits revealed that the spectra are quantitatively described by the macroscopic dielectric theory for anisotropic crystals. Comparisons are made with infrared data.