Majorana Fermion (IMAGE) Science China Press Caption Topological insulator/superconductor heterostructure. Majorana fermion exists in the vortex core on the surface of the heterostructure. Credit ©Science China Press 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.