Influence of solitons on the conductance properties of double-stranded deoxyribonucleic acid

Pramana

S A Ketabi1¹  T Ghane²  N Shahtahmasebi² 

[1] School of Physics, Damghan University of Basic Sciences, Damghan, Iran$$;Department of Physics, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran$$

关键词: Deoxyribonucleic acid;    electronic transmission;    soliton;    ladder model;    Green’s function.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

A numerical study is presented to investigate the role of solitons in the electronic states of double-stranded DNA (dsDNA) molecule in the metal/DNA/metal system. Based on tight-binding Hamiltonian model and within the framework of a generalized Green’s function technique, we consider a ladder model for poly(dG)-poly(dC) DNA molecule containing M cells with four sites (two base pair sites and two backbone sites) in each cell. In the presence of a sublattice of solitons, our results show that the homogeneous soliton distributions induce the electronic states in the band gap of DNA molecule. In addition, the room temperature current–voltage characteristic of the system shows a linear and ohmic-like behaviour.

【 授权许可】

Unknown