Transverse tunneling current through guanine traps in DNA

Abstract

The current - voltage dependence of the transverse tunneling current through the electron or hole traps in a DNA is investigated. The hopping of the charge between the sites of the trap and the charge-phonon coupling results in a staircase structure of the I-V curve. For typical parameters of the DNA molecule the energy characteristics of a DNA trap can be extracted from the I-V dependence, viz., for a small gate voltage the phonon frequency and for a large gate voltage the hopping integral can be found from the positions of the steps in the I-V curve. Formation of the polaronic state also results in the redistribution of the tunneling current between the different sites of the traps.

References in corpus (4)

• Franck-Condon blockade and giant Fano factors in transport through single molecules
• Inelastic electron tunneling spectroscopy in molecular junctions: Peaks and dips
• Electronic signature of DNA nucleotides via transverse transport
• Hole interactions with molecular vibrations on DNA

Cited by in corpus (5)

• Physical approaches to DNA sequencing and detection
• DNA double helices for single molecule electronics
• Tight-binding modeling of charge migration in DNA devices
• Electronic parameters for the hole transfer in DNA duplex oligomers
• Environment effects on the electric conductivity of the DNA