Surface electronic structure of complex B-metal perovskites

• Published in: Surface science 1994-04, Vol.307, p.1166-1171
• Main Authors: Flavell, W.R., Hoad, D.R.C., Mian, M., Morris, B.C., Roberts, A.J., Sarker, M.M., Wincott, P.L., Teehan, D., Bailey, P.
• Format: Article
• Language: English
• Subjects: Clean metal, semiconductor, and insulator surfaces; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Electron and ion emission by liquids and solids; impact phenomena; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures; Exact sciences and technology; Photoemission and photoelectron spectra; Physics; Surface and interface electron states; Surface states, band structure, electron density of states
• ISSN: 0039-6028; 1879-2758
• DOI: 10.1016/0039-6028(94)91558-X

We present photoemission results for two systems, SrSn 1− x Sb x O 3 and its row 6 analogue, BaPb 1− x Bi x 0 3. The variation in electronic structure as a function of composition is explored, particularly in the region of the metal-to-nonmetal transitions. In the case of the Sr system, dramatic surface segregation of Sb is revealed. This is analogous to that observed in Sn 1− x Sb x 0 2. Resonant photoemission at oxygen and metal thresholds is used to explore the character of the valence band and gap states in these materials.