Physical properties and electronic structure of a new barium titanate suboxide Ba{sub 1+δ}Ti{sub 13−δ}O{sub 12} (δ = 0.11)
- Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, California 90095 (United States)
- Department of Physics, Rutgers University, Piscataway, New Jersey 08854 (United States)
- Department of Physics and Astronomy, University of Waterloo, Waterloo N2L 3G1 (Canada)
- UCLA Molecular Instrumentation Center, University of California Los Angeles, Los Angeles, California 90095 (United States)
The structure, transport, thermodynamic properties, x-ray absorption spectra (XAS), and electronic structure of a new barium titanate suboxide, Ba{sub 1+δ}Ti{sub 13−δ}O{sub 12} (δ = 0.11), are reported. It is a paramagnetic poor metal with hole carriers dominating the transport. Fermi liquid behavior appears at low temperature. The oxidization state of Ti obtained by the XAS is consistent with the metallic Ti{sup 2+} state. Local density approximation band structure calculations reveal the material is near the Van Hove singularity. The pseudogap behavior in the Ti-d band and the strong hybridization between the Ti-d and O-p orbitals reflect the characteristics of the building blocks of the Ti{sub 13} semi-cluster and the TiO{sub 4} quasi-squares, respectively.
- OSTI ID:
- 22415279
- Journal Information:
- APL materials, Vol. 3, Issue 4; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 2166-532X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Synthesis, structure and physical properties of reduced barium titanate Ba{sub 2}Ti{sub 13}O{sub 22}
Nematic fluctuations in the cuprate superconductor Bi2Sr2CaCu2O8+δ