Cr- and V-doped Bi2Te3 films exhibit non-monotonic Curie temperature versus dopant concentration, attributed to evolution from van Vleck-type to RKKY-type ferromagnetism as doping drives the system from nontrivial TI to trivial semiconductor.
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Evolution of Dopant-Concentration-Induced Magnetic Exchange Interaction in Topological Insulator Thin Films
Cr- and V-doped Bi2Te3 films exhibit non-monotonic Curie temperature versus dopant concentration, attributed to evolution from van Vleck-type to RKKY-type ferromagnetism as doping drives the system from nontrivial TI to trivial semiconductor.