Picture A and B (IMAGE) Academy of Finland Caption Picture: a) By local manipulation of material parameters, it is possible to tune the properties of charge carriers in Weyl semimetals; b) With suitable local manipulation of material parameters, one can tailor the carrier motion and design novel electronic devices such as the electron lens, which focuses the incoming carriers. Credit Teemu Ojanen 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.