Graphene Superconducting (image) University of Vienna Caption This image shows ARPES measurements of Calcium doped graphene. Left: the Fermi surface of graphene (top) and the Dirac cone (bottom). Right: The kink in the spectral function in the two crystallographic main directions. The scientists analyzed the strength of the kink in order to estimate the superconducting critical temperature. Credit Copyright: A. Grüneis and A.V. Fedorov Usage Restrictions The image may only be used with appropriate caption or credit. 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.