Photoelectron spectroscopic study of Ba sub 1 minus x Rb sub x BiO sub 3

Journal Article · Tue Jan 01 04:00:00 EST 1991 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.43.435· OSTI ID:5997720

Itti, R; Tomeno, I; Ikeda, K; Tai, K; Koshizuka, N; Tanaka, S ^[1]

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1. Superconductivity Research Laboratory, International Superconductivity Technology Center, 1-10-13 Shinonome, Koto-ku, Tokyo 135, Japan (JP)

A photoelectron spectroscopic study to investigate the electronic structure of a noncuprate oxide superconductor Ba{sub 1{minus}{ital x}}Rb{sub {ital x}}BiO{sub 3} (0{le}{ital x}{le}0.4) system is reported. Comparison of the results with those inconclusively reported for Ba{sub 1{minus}{ital x}}K{sub {ital x}}BiO{sub 3} and BaPb{sub 1{minus}{ital x}}Bi{sub {ital x}}O{sub 3} is discussed. It is concluded that the chemical environment of substituted Rb in this system is similar to that of Rb metal, core-level binding energies of Bi and Ba are unaffected by Rb substitution, and the shift of the valence band towards lower binding energy upon hole-carrier doping is observed. A characteristic change of the density of states in the vicinity of the Fermi level with composition {ital x} is observed, suggesting that the nonmetal-to-metal transition occurs through a continuous change of the electronic states of the system.

• OSTI ID: 5997720
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 43:1; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BISMUTH COMPOUNDS
BISMUTH OXIDES
CHALCOGENIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
ENERGY LEVELS
FERMI LEVEL
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
PHYSICAL PROPERTIES
RUBIDIUM COMPOUNDS
RUBIDIUM OXIDES
SPECTROSCOPY
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
VALENCE