BAND STRUCTURES OF ZINCBLENDE-TYPE MNAS AND (MNAS)(1)(GAAS)(1) SUPERLATTICE

Electronic band-structures of the hypothetical zinc-blende phase of Mn As and the (MnAs)(1)(GaAs)(1)(0 0 1) superlattice are calculated by us ing the full-potential linearized augmented-plane-wave method in order to discuss the effect of Mn-substitution for Ga in GaAs on their elec tronic and magnetic properties. The magnetic polarization antiparallel to the Mn moment is induced at the As site in the ferromagnetic state of both systems, which indicates the antiferromagnetic coupling betwe en Mn-spins and valence-band carriers having mainly As 4p character. ( C) 1998 Elsevier Science B.V. All rights reserved.