Helium Ion Beam (IMAGE) American Institute of Physics Caption This image shows a representation of the helium ion beam form creating an atomic-scale Josephson junction in a crystal of yttrium barium copper oxide, which is a high-transition-temperature ceramic superconductor. The inset depicts what the device looks like on the macroscopic millimeter scale. Credit Meng Ma/UCSD Usage Restrictions This image may be used only with appropriate caption and credit. 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.