Electronic Structure of Perovskite Oxides, LaMO3 (M = Ti-Ni), from High-Energy Electron Spectroscopic Investigations

✍ Scribed by D.D. Sarma; A. Chainani

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 489 KB
• Volume: 111
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1994.1219

✦ Synopsis

We study the electronic structure of the (\mathrm{LaMO}{3}(M=\mathrm{Ti}-\mathrm{Ni})) perovskite oxides as probed by various high-energy electron spectroscopics. These spectroscopic studics, in conjunction with model many-body calculations, provide important information concerning the ground state character of these oxides. In particular, the on-site Coulomb interaction strength, (U{d d}), the charge transfer energy, (\Delta), and the transfer integral between the metal (3 d) and oxygen (2 p) states, (t), have been estimated. These parameters are found to exhibit a systematic variation across the series. Electronic structure of the perovskites is discussed in terms of electron-removal and electron-addition spectra for the parent compound as well as for doped (\mathrm{LaMO}_{3}), with specific reference to semiconductor-metal transitions. 1994 Academic Press, inc.