HARPES (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption By collecting and comparing HARPES data at room and cryo temperatures, Berkeley Lab researchers were able to correct for density of state (DOS) and x-ray photoelectron diffraction (XPD) influences in determining electronic structures deep below sample surfaces. Credit Image from Fadley group 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.