DNA导电中电子的有效紧束缚模型
Some Effective Tight-Binding Models for Electrons in DNA Conduction: A Review
摘要：
DNA导电的量子输运作为制备纳米线的候选材料以及科学机制的兴趣得到了广泛的研究。本文综述了DNA聚合物的电子态和导电/转移的研究进展。我们主要研究了作为双链DNA电子性质的简单模型的两链和三链体系（梯形模型）的能带结构和局域化性质的相关效应。此外，我们还研究了几种实际DNA序列，如大肠杆菌噬菌体，人类22号染色体，与人工相关无序序列的电子态局域化性质进行了比较。聚（dA）-聚（dT）和聚（dG）-聚（dC）DNA聚合物的电荷转移性质也提出了在极化子模型的框架内，由于载流子和双链DNA的晶格振动之间的耦合的本地化长度。
英文摘要：
Quantum transport for DNA conduction has widely studied with interest in application as a candidate in making nanowires as well as interest in the scientific mechanism. In this paper, we review recent works with concerning the electronic states and the conduction/transfer in DNA polymers. We have mainly investigated the energy band structure and the correlation effects of localization property in the two- and three-chain systems (ladder model) with long-range correlation as a simple model for electronic property in a double strand of DNA by using the tight-binding model. In addition, we investigated the localization properties of electronic states in several actual DNA sequences such as bacteriophages of Escherichia coli, human-chromosome 22, compared with those of the artificial disordered sequences with correlation. The charge transfer properties for poly(dA)-poly(dT) and poly(dG)-poly(dC) DNA polymers are also presented in terms of localization lengths within the frameworks of the polaron models due to the coupling between the charge carriers and the lattice vibrations of the double strand of DNA.
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