External control of a metal-insulator transition in GaMnAs wires |
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Authors: | Nguyen Anh Kiet Brataas Arne |
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Institution: | Department of Physics, Norwegian University of Science and Technology, NO-7491, Trondheim, Norway. |
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Abstract: | Quantum transport in disordered ferromagnetic (III,Mn)V semiconductors is studied theoretically. Mesoscopic wires exhibit an Anderson disorder-induced metal-insulator transition that can be controlled by a weak external magnetic field. This metal-insulator transition should also occur in other materials with large anisotropic magnetoresistance effects. The transition can be useful for studies of zero-temperature quantum critical phase transitions and fundamental material properties. |
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