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Magnetic Topological Insulator

Caption: At left, the active area of magnetic topological insulator (dark gray) is 3 microns across and only 70 atoms thick. The blue background is an insulating gate dielectric and the yellow regions are metallic electrodes. At right, the internal magnet favors the "off" state of the transistor on the left. This is evidence for a new type of magnetic semiconductor.

Credit: RIKEN

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