💡RIKEN discovers the giant magnetoresistance effect accompanying the change in topology
Cooperative research group of RIKEN (RIKEN) Emergent Materials Science Research Center, Tohoku University Metal Materials Research Institute developed a “topological insulator” laminated thin film in which magnetic and nonmagnetic layers are alternately stacked, and the magnetoresistive ratio [ 2] We have discovered a very huge magnetoresistance effect, over 10,000,000%.
Superconductivity is famous as the transportation phenomenon of electrons without energy loss. In recent years, it has become clear that topological substances that characterize electronic states in substances by topology can also carry “topological current” without energy loss It was. These topological currents are also being actively studied all over the world, possibly being available at room temperature.
Moreover, it is thought that reconfigurable topological edge current circuit can be designed by combining the laminated thin film sample developed in this research and local magnetic control technology. Furthermore, by realizing a laminated structure with a superconductor or the like, it also leads to application to quantum computing
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