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Giant anisotropic magnetoresistance in insulating ultrathin (Ga,Mn)As

Gareev, Rashid ; Petukhov, A. ; Schlapps, Markus ; Sadowski, Janusz ; Wegscheider, Werner


Molecular-beam epitaxy grown, 5 nm thick annealed Ga0.95Mn0.05As films demonstrate transition from metallic to insulating state for sheet resistances near resistance quantum, which we connect with the two-dimensional hole localization. Below the metal-insulator transition we found the giant anisotropic magnetoresistance (GAMR) effect, which depends on the orientation of magnetization to ...


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