Interacting polarons (IMAGE) University of Innsbruck Caption Potassium atoms (yellow) surrounded by lithium atoms (blue) form polarons that interact with each other. Credit IQOQI Innsbruck/Harald Ritsch Usage Restrictions Please cite the owner of the image when publishing. This image may be freely used by reporters as part of news coverage, with proper attribution. License Original 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.