Ferromagnetism and high Curie temperature in semiconductor heterostructures with Mn δ-doped GaAs and p-type selective doping -: art. no. 241308

The interaction between the magnetic dopants (Mn) and 2-dimensional hole gas (2DHG) in Mn delta-doped GaAs/Be-doped p-type AlGaAs heterostructures, where holes were supplied from the Be-doped AlGaAs to the Mn delta-doped GaAs, realized ferromagnetic ordering. The Curie temperature T-C of the heterostructure prepared with suitable growth conditions was 172 K, highest among the T-C values reported in III-V (InAs, GaAs) magnetic semiconductors.