Magnetic field driven bound magnetic polaron with composition effect in semimagnetic triangular quantum well

Abstract

Theoretical investigation has been carried out on the bound magnetic polaron (BMP) due to the strong exchange interaction between the charge carriers bound to an acceptor/donor impurity and the localized spins of Mn2+ ion in a semimagnetic triangular quantum well as a function of externally applied magnetic field. The effect of various combinations of the composition of Mn2+ ion in the well (xin) and in the barrier (xout), in such a way that xout – xin = x is always the same on the donor BMP, has been studied and the effect of triangular confining potential on the BMP associated with the heavy and light holes bound to an acceptor impurity has also been addressed. The binding energy of the acceptor/donor impurity has been calculated using variational technique in the effective mass approximation and the interaction between the magnetic moment of the Mn2+ ions and the spin of the carrier has been treated using mean field theory.