Bulk Electron Spectrum (IMAGE) Moscow Institute of Physics and Technology Caption The bulk electron spectrum in a Weyl semimetal is described by a set of an even number of Weyl cones (aka valleys) centered at special points in the momentum space. These conical points, which are sometimes called "diabolical," conceal nontrivial topology. Credit MIPT Press Office Usage Restrictions None 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.