Atomic resolution images of Ba0.6K0.4BiO3 have been obtained at electron-dose levels of 102 e-/Å2 using a slow-scan CCD camera on a high-resolution electron microscope; at this dose level electron-beam damage can be avoided. The superconducting material is a clean perovskite without evidence for any distortions such as charge-density waves. At higher dose levels modulations appear which, from measurements of the desorbing species under low-energy electron radiation, are due to ionization damage and loss of oxygen.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering