Randall Feenstra (IMAGE) Carnegie Mellon University Caption Randall Feenstra, Professor of Physics, Carnegie Mellon University Credit Carnegie Mellon University Usage Restrictions Credit: Carnegie Mellon University 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.