Phase Diagram (IMAGE) DOE/Brookhaven National Laboratory Caption Disappearing stripes linked with free electron movement: Scientists used a precision microscope to simultaneously explore electrons' arrangements and movements as charge carriers called holes were added to transform a copper-oxide material from an insulator to a superconductor. With increasing hole density, the material first takes on a mysterious Credit Brookhaven National Laboratory Usage Restrictions OK for use with stories about this research 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.