Figure 1 (IMAGE) Institute for Basic Science Caption Schematic illustration of the metal-insulator transition in magnetic topological semiconductors. The topological nodal line is where electronic bands cross and form a line in energy-momentum space. With magnetic ordering, spin-orbit energy depending on the spin direction decides whether the system is a semiconductor (left) or metal (right). Credit Institute for Basic Science Usage Restrictions Attribution Required 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.