Partial suppression of structural distortion in epitaxially grown BaBiO3 thin films

Kei Inumaru, Hajime Miyata, and Shoji Yamanaka
Phys. Rev. B 78, 132507 – Published 10 October 2008

Abstract

Thin films of BaBiO3, the parent compound of Ba1xKxBiO3 superconducting oxide with Tc30K, were prepared by pulsed laser deposition and their structures were investigated by x-ray diffraction analysis. It is known that bulk BaBiO3 crystal adopts structures having two kinds of distortions, namely, tilting and breathing of BiO6 octahedra below 750–800 K. Epitaxial BaBiO3 (001) film was grown on MgO (001) substrate at 773 K. In the film, the BiO6 tilting mode was suppressed at ambient temperature and the structure was cubic with superlattice breathing distortion. This is the experimental realization of BaBiO3 having cubic structure with only superlattice breathing distortion at ambient temperature. An electric transport measurement showed that the film is insulating. These results show direct experimental evidence for the idea provided by theoretical studies that the breathing distortion solely can open the gap around the Fermi energy of BaBiO3 phase.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 20 June 2008

DOI:https://doi.org/10.1103/PhysRevB.78.132507

©2008 American Physical Society

Authors & Affiliations

Kei Inumaru, Hajime Miyata, and Shoji Yamanaka

  • Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1, Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 78, Iss. 13 — 1 October 2008

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×