The College of Education for Pure Sciences organized a scientific lecture on "The Effect of High Spin Inversion on the Electronic Properties of a Four-Dot Square Quantum Dot Structure." The lecture, presented by student Waleed Hameed Abdul Ameer, explored the theoretical impact of spin inversion interactions within and between quantum dots on the electronic properties of a system consisting of four square quantum dots connected to ferromagnetic poles via quantum junctions. The quantum dot QD1 is linked to the donor (acceptor). The spin inversion interaction within quantum dots QD1 and QD2 was considered, while the spin inversion interaction between QD1 and QD2 was investigated. The theoretical analysis relied on a tight coupling model, which encompasses the spin-dependent effective energy levels of the quantum dots and quantum junctions, as well as the spin-dependent coupling strength between the subsystems. Both strong and weak coupling regimes were investigated. All effective parameters were examined to determine their role in the transport spectrum. This study demonstrated that spin inversion events within and between quantum dots activate the spin-up and spin-down properties of electrons. Ultrafine interactions shift the Breit-Wiganer resonances in the transport spectrum towards relatively higher energies, while orbital spin interactions shift the resonances towards lower energies. Our results confirm that the quantum dot structure behaves as a collective structure in the case of spin inversion between dots and as four separate quantum dots in the case of spin inversion within a single dot. These properties can be practically exploited to control spin-dependent transport properties, such as spin filtering

.