(IMAGE) Institute of Science and Technology Austria Caption Experimental data from trilayer graphene (bottom) shows two circular Fermi surfaces, creating a ring-like shape, in which the occupied electronic states lie (top). In unconventional superconductivity, the electrons are assumed to be “glued” together by an interaction, not to be confused with their usual interaction of electrical repulsion. Credit IST Austria Usage Restrictions Use credit License Original 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.