Enhanced spin-polarized transport through DNA double helix by gate voltage

Abstract

We report on a way to manipulate the spin transport through double-stranded DNA contacted by normal-metal electrodes. On the basis of an effective model Hamiltonian, the conductance and the spin polarization are calculated in the presence of a gate voltage by using the Landauer-Büttiker formula. Our results indicate that the spin polarization presents strong dependence on the magnitude as well as the direction of the gate voltage. The spin polarization can be significantly enhanced by tuning the gate voltage and shows oscillating behavior with increasing the DNA length.

6 pages, 6 figures

References in corpus (3)

• Supramolecular Spin Valves
• DNA double helices for single molecule electronics
• Influence of dephasing process on the quantum Hall effect and the spin Hall effect

Cited by in corpus (5)

• Vibration-Enhanced Spin-Selective Transport of Electrons in DNA Double Helix
• Contact effects in spin transport along double-helical molecules
• Electronic structure and carrier transfer in B-DNA monomer polymers and dimer polymers: Stationary and time-dependent aspects of wire model vs. extended ladder model
• Spin-selective transmission through a single-stranded magnetic helix
• Local equilibria and state transfer of charged classical particles on a helix in an electric field