Simultaneous effect of laser and magnetic field on bound magnetic polaron in type I and reverse type I core/shell semimagnetic nanostructures

Abstract

Combined effect of magnetic and the intense laser fields on the donor-bound magnetic polaron of semi-magnetic core shell nanostructures is investigated theoretically to explore them for opto-electronic, spintronic devices. Based on the band alignments of donor, the two probable semi-magnetic Core Shell Nanostructures (CSNs) namely type I CdTe/Cd 0.7 Mn 0.3 Te and reverse type I Cd 0.7 Mn 0.3 Te/CdTe are considered in the present study. The interplay of Bound Magnetic Polaron (BMP) with the donor impurity is explored through spin polaronic energy (E SP ) and magnetization (M) for different laser and magnetic fields by applying laser field intensity ranging from 0.58 to 14.5 μW/Å 2 of frequency 10 THz along with magnetic field (B) of about 5–30 T. The dimensional impact of dot and the barrier of the respective CSN on the sublevel Energy (SE), E SP and M is also examined under applied external fields. The carriers of reverse type I CSN are more dynamic and perform diverse behaviour in the presence of external laser and magnetic fields. • Dynamics of magnetic polaron bound to a laser dressed donor is explored through Spin E SP and M. • External magnetic field enhances the E SP and M of both type I and reverse type I semi-magnetic CSN. • The screening effect and the laser dressed electronic states decline the E SP and M of the semi-magnetic CSNs. • Laser irradiance highly governs the dynamic behaviour of donor electron. • Sublevel energy of the carrier is altered by applied external magnetic and laser fields.