Transport Properties in ZnO/ZnCdO Heterostructure with Spin–Orbit Interaction: Effect of In-Plane Magnetic Field & Delta Potential

Abstract

The electron tunneling in the ZnO/ZnCdO resonant tunnel barrier is theoretically investigated to study the role of the in-plane magnetic field. The transfer matrix method is applied to understand the effect of spin–orbit interaction for various magnetic fields. The Dresselhaus spin–orbit interaction and the spin-dependent Zeeman splitting result in the spin-separation in this heterostructure. The externally applied in-plane magnetic field enhances the energy separation between the spin components. The observed dwell time is in the order of microseconds. As the magnetic field increases, the degree of spin polarization enhances and one can obtain a high degree of spin –polarization at a high magnetic field. The energy of resonance shifts to a high value as the height of the delta potential increases. The degree of spin-polarization also depends on the delta potential.