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Large magnetic gap at the Dirac point in Bi2Te3/MnBi2Te4 heterostructures

Rienks, E. D. L. ; Wimmer, S. ; Sánchez-Barriga, J. ; Caha, O. ; Mandal, P. S. ; Růžička, J. ; Ney, A. ; Steiner, H. ; Volobuev, V. V. ; Groiss, H. ; Albu, M. ; Kothleitner, G. ; Michalička, J. ; Khan, S. A. ; Minár, J. ; Ebert, H. ; Bauer, G. ; Freyse, F. ; Varykhalov, A. ; Rader, O. ; Springholz, G.


Magnetically doped topological insulators enable the quantum anomalous Hall effect (QAHE), which provides quantized edge states for lossless charge-transport applications1,2,3,4,5,6,7,8. The edge states are hosted by a magnetic energy gap at the Dirac point2, but hitherto all attempts to observe this gap directly have been unsuccessful. Observing the gap is considered to be essential to ...


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