Electronic Property of Thin Single-Crystal Films of α-Al2O3on Ru(0001)

Autor:	Takeaki Sakurai, Hiroshi Fujimoto, Yuki Ebe, Yoshitada Murata, Kazuo Nagata, Michio Okada
Rok vydání:	2001
Předmět:	Aluminium oxides Fabrication Materials science business.industry Band gap Electron energy loss spectroscopy Scanning tunneling spectroscopy Analytical chemistry Oxide General Physics and Astronomy chemistry.chemical_compound Optics chemistry Phase (matter) Thin film business
Zdroj:	Journal of the Physical Society of Japan. 70:793-796
ISSN:	1347-4073 0031-9015
DOI:	10.1143/jpsj.70.793
Popis:	High-quality single-crystal films of α-Al 2 O 3 with various thicknesses below 35 A have been fabricated on the Ru(0001) surface. The phase transtion from γ- to α-Al 2 O 3 has been used for fabrication. The thickness dependence of the band gap for the oxide layer has been measured by the interband transition using electron energy loss spectroscopy. The band gap has been found to decrease with decreasing oxide thickness. The same tendency of this extraordinary result has been observed in scanning tunneling spectroscopy. These results can be interpreted by the many-body effect.
Databáze:	OpenAIRE
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