Quantum transport along the armchair and zigzag edges of β12-borophene nanoribbons in the presence of a Zeeman magnetic field and dilute charged impurities

Abstract

Tuning the physical properties of nanoribbons is increasing for real applications. We here focus on magnetic and electronic effects to contribute to this matter. We particularly investigate the effects of a Zeeman magnetic field and dilute charged impurities on the quantum transport properties of β₁₂-borophene nanoribbons (BNRs), both in the armchair and zigzag directions, by considering substrate effects. Calculations are done using the five-band tight-binding Hamiltonian, the Green's function approach (for density of states), the Landauer–Büttiker formalism (for quantum transport quantities), and the self-consistent Born approximation (for impurity effects). Our findings show that both electronic transmission probability and current–voltage characteristics of the system can be significantly adjusted in the presence of Zeeman splitting and charged dilute impuritiesy. Interestingly, the Zeeman splitting effect leads to an enhancement of the current that flows through the channel, whereas a reduction is observed in the electrical current of charged impurity-imbrued β₁₂-BNR. Moreover, through a detailed analysis of armchair and zigzag directions, we found that the transport characteristics of impurity-induced armchair β₁₂-BNRs are much more strongly tuned than those of zigzag ones. These results provide useful information for logic nanoelectronics.