Abstract
A single molecular junction can act as spintronic device when a molecule coupled with magnetic electrodes. Various analyses have been done to understand the spin transport properties of single molecular junction to develop highly efficient spintronic devices. The structure of a molecule plays a crucial role in spin transport properties of such molecular junction. In this paper, we explored the spin-dependent electron transport properties of functional isomers namely benzyl alcohol and p-cresol. To understand the spin-dependent transport properties of these molecules, we have anchored it with nickel electrodes. The Density Functional Theory (DFT) with Non-Equilibrium Green’s Function (NEGF) was implemented to calculate Density of States (DOS), transmission spectrum, and I–V characteristic of these molecular junctions in parallel and antiparallel configurations. The spin filter efficiency and magnetoresistance percentage were calculated using the current value at various bias ranges. From the spin filter efficiency, we found that the down-spin propagates in antiparallel configuration of both benzyl alcohol and p-cresol molecular junction. Moreover, we observed a negative magneto resistance at higher bias which may due to the spin mixing and interface states of the molecular junction.
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Acknowledgements
We gratefully acknowledge financial support for this project from DST-FIST, Government of India (Ref. No. SR/FST/PSI-155/2010).
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Arivazhagan, A., Jasmine, J.M., Rajalakshmi Mohanraj, H. et al. Spin-dependent electron transport analysis of benzyl alcohol and p-cresol based single molecular junction: a DFT-NEGF approach. J Mater Sci: Mater Electron 33, 9490–9497 (2022). https://doi.org/10.1007/s10854-021-07468-z
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DOI: https://doi.org/10.1007/s10854-021-07468-z