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Enhancement of Power by “Box-Car” Transmission Profile in Superlattice Magnetic Tunnel Junctions

Thermoelectric properties of superlattice magnetic tunnel junctions (SL-MTJs) comprising of MgO barriers, ZnO quantum wells and CoFeB contacts are investigated in the linear and nonlinear response regime. The transmission function is calculated by the nonequilibrium Green’s function (NEGF) formalism. The anti-reflective (AR) regions idea in SL-MTJs leads to an enhancement in power factor as well as output power due to the presence of “box-car” transmission in AR-MTJs. Therefore, it can be proposed as a new way to progress in the field of spincaloritronics.