Externally controlled high degree of spin polarization and spin inversion in a conducting junction: Two new approaches

TL;DR

This paper introduces two innovative methods to control spin polarization and inversion in a conducting junction using a magnetic quantum ring, with potential for experimental realization and robust performance across various parameters.

Contribution

The study presents two novel approaches for externally controlling spin polarization and inversion in a quantum junction, expanding the possibilities for spintronic device design.

Findings

Effective regulation of spin polarization and inversion demonstrated.

Robustness of control methods across diverse parameters.

Potential for laboratory implementation confirmed.

Abstract

We propose two new approaches for regulating spin polarization and spin inversion in a conducting junction within a tight-binding framework based on wave-guide theory. The system comprises a magnetic quantum ring with finite modulation in site potential is coupled to two non-magnetic electrodes. Due to close proximity an additional tunneling is established between the electrodes which regulates electronic transmission significantly. At the same time the phase associated with site potential, which can be tuned externally yields controlled transmission probabilities. Our results are valid for a wide range of parameter values which demonstrates the robustness of our proposition. We strongly believe that the proposed model can be realized in the laboratory.