YRS (image) Rice University Share Print E-Mail Caption This microscopic closeup shows a small sample of ytterbium dirhodium disilicide, one of the most-studied 'heavy fermion' composites. The scale bar in the center of the screen is one millimeter wide. Credit Marc Tippmann/Technical University of Munich Usage Restrictions Must credit: "Marc Tippmann/Technical University of Munich" Share Print E-Mail 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.