Abstract
By using density functional theory in combination with non-equilibrium Green's function method, we have investigated the spin-polarized electronic transport properties of four DNA base devices, namely, adenine (A), cytosine (C), guanine (G) and thymine (T). The results show the spin-polarized transport properties can be effectively regulated by adopting different bases, and thymine based device can exhibit high-efficiency spin-filtering, negative differential resistance, spin rectifying behaviors and switching effect by tuning the external magnetic field. We find that the variation in the degree of localization of the frontier molecular orbitals at different biases is responsible for these interesting phenomena. These effects can be explained by the spin-resolved transmission spectrum and the spatial distribution of molecular orbitals around the Fermi level. Our results suggest that thymine base holds great potential application in designing multi-functional spin molecular device.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.