Mixing at the Interface (IMAGE) DOE/Pacific Northwest National Laboratory Caption A cross-sectional scanning transmission electron micrograph of the interface between the polar lanthanum chromium oxide (LaCrO3) and the nonpolar strontium titanium oxide (SrTiO3). Although the interface appears to be atomically abrupt, detailed spectroscopic measurements show that cation mixing occurs in the interfacial region. Credit Pacific Northwest National Laboratory Usage Restrictions Credit PNNL License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.