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Structural phase transitions in semiconducting SrTiO3

Authors
Journal
Solid State Communications
0038-1098
Publisher
Elsevier
Publication Date
Volume
27
Issue
12
Identifiers
DOI: 10.1016/0038-1098(78)91568-5

Abstract

Abstract From ultrasonic velocity measurements we found that in SrTiO 3 the temperature for the structural phase transition is lowered in samples reduced in hydrogen, and increased in Nb-doped samples. In the reduced samples the shift in T c is proportional to the concentration of oxygen vacancies. The results can qualitatively be understood in terms of local changes in the d ϵ/ p σ-hybridization of Ti-3 d and 0–2 p orbitals.

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