Electron Phonon Coupling Phoot (IMAGE) DOE/SLAC National Accelerator Laboratory Caption SLAC/Stanford Professor Zhi-Xun Shen, left, and SLAC staff scientist Patrick Kirchmann with the ARPES instrument used to measure electron energy and momentum in an iron selenide film. Credit Dawn Harmer/SLAC National Accelerator Laboratory Usage Restrictions None 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.