Abstract
Transmission coefficient as a function of incident energy for three values of incident wavevector k//.
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•Spin polarized transport by accelerating quantum is explored theoretically in an heterostructure based on triple barriers.•An appreciable spin polarization effect appears in triple barrier heterostructure.•A tunable spin-polarized filter can be achieved for spintronics applications.
Electronic transmission and spin polarization have been computed as a function of the incident electron energy for heterostructures like InAs/GaSb/InGaAs triple barriers. This was achieved using the transfer matrix method while taking into account the Rashba spin-orbit interaction. The desired spin polarization can be adjusted through two InGaAs accelerating quantum wells. The spin-up and down transmission coefficients and the spin polarization can be tuned by varying the depths and widths of the accelerating quantum wells, as well as the incident wave vector k//. When we increase the in-plane wave vector, the spin polarization increases, and the transmission peaks shift towards higher energies. However, when we increase the depth of the wells, the transmission peaks shift towards lower energies, and the spin polarization reaches 32%. These interesting results could be employed in the design and fabrication of spin filters by selecting the appropriate accelerating quantum wells.