Topological insulator nanowire (IMAGE) University of Basel Caption Applying a magnetic field causes current to flow more easily in one direction along the nanowire than in the opposite one Credit (Image: University of Basel, Department of Physics Usage Restrictions With current release only 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.