Metal–insulator transition in DNA molecules induced by long-range correlations in the sequence of nucleotides

Bagci, V. M. K.; Krokhin, Arkadii

doi:10.1016/j.chaos.2007.01.053

Cited by 14 publications

(7 citation statements)

References 37 publications

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“…Thus, our above analytical treatments agree with previous studies that coupling to the side sites leads to the existence of the band gap. However, our numerical results show that delocalization induced by increase of environmental disorder holds for a large region of eigenenergies, while numerical results for disordered DNA by Bagci et al 13 show that this only appears at some special eigenenergies. This difference may be due to the difference in numerical methods.…”

Section: Equation ͑7͒contrasting

confidence: 71%

“…Since the model we use looks like the fishbone model for a conducting DNA molecule [11][12][13][14] where disorders may also be introduced by environment, we would like to discuss our results and the results in recent studies for fishbone model. Let us first take another look at Eq.…”

Section: Equation ͑7͒mentioning

confidence: 99%

“…This difference may be due to the difference in numerical methods. We use the standard transfer-matrix method and the localization length obtained is for a chain with infinite length, while Bagci et al 13 have used a modified version of transfer-matrix method to obtain the effective localization length of a chain with finite length. Thus, our results are for very long chains while their results are for relatively short chains.…”

Section: Equation ͑7͒mentioning

confidence: 99%

See 2 more Smart Citations

Disorder-induced delocalization in quantum wires: One-dimensional tight-binding ideal chain

Xiong

2007

Phys. Rev. B

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Based on the analysis of a one-dimensional tight-binding chain subject to random interactions from disordered side sites, a possible picture for the disorder-enhanced conductivity for nanowires is provided. Opposite to the physical intuition that the conduction of a quantum wire gets poorer when the disorder of the side sites increases, the conduction of the wire improves after the disorder of the environment surpasses a critical value. The reason is that the number of effective localized disordered states that can strongly scatter the conduction states in the quantum wire decreases with the increase of the environmental disorder.

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Section: Equation ͑7͒contrasting

confidence: 71%

Section: Equation ͑7͒mentioning

confidence: 99%

Section: Equation ͑7͒mentioning

confidence: 99%

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Disorder-induced delocalization in quantum wires: One-dimensional tight-binding ideal chain

Xiong

2007

Phys. Rev. B

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“…13 It has been also argued that the long-range correlation of inhomogeneous potentials in the base sequence of a DNA molecule is responsible for its electronic transport. [14][15][16] When the correlation length d of disorder is much shorter than a system size L, physical quantities are usually selfaveraged over many subsystems of size d . This is due to the assumption that the relative variance of observables converge to zero in the thermodynamic limit.…”

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confidence: 99%

Finite size effects in infinitely large electronic systems with correlated disorders

2009

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We investigate localization properties of one-dimensional electronic systems with long-range correlated disorders characterized by a power-law spectral density. An abrupt change from extended to gradon states is found to occur in individual samples independently of system sizes. This abrupt change differs from the ordinary Anderson transition in the sense that the former accompanies strong sample fluctuations that remain significant even in the thermodynamic limit. We further observe that sample-averaged quantities such as the inverse participation ratio and the level-spacing distribution exhibit nontrivial crossover behaviors from extended states to gradon states.

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“…10,[21][22][23][24] Charge transfer mechanisms through the DNA molecule were generally explained using two main processes, tunnelling and hopping, depending on the length and sequence of DNA molecule. [25][26][27][28][29][30] Tunneling has been used to explain the short-range charge transfer through A-T base pairs while hopping explains the long-range charge transfer between G-C base pairs. 29,30 However, previous experimental and theoretical approaches involved difficult and complicated methodologies in addition to requiring sophisticated instruments.…”

Section: Introductionmentioning

confidence: 99%

Electronic Properties of Short Polynucleotides Studied Using Schottky Junctions

Daraghma

Talebi

Periasamy

2021

Journal of Elec Materi

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Deoxyribonucleic acid (DNA), the blueprint of life, has attracted recent attention concerning its potential applications in electronics. In order to realize these applications, charge transfer through the molecule has been subjected to numerous experimental and theoretical studies in the last few decades. As a result of varying experimental conditions, different electrical behaviors have been observed. The sensitive structure of DNA is influenced by extreme environmental conditions as shown in common characterization techniques. Finding a simple yet quantitative accurate method is more efficient for understanding the electronic properties of DNA. In this work, we have employed DNA-specific Schottky junctions integrated within a printed circuit board (PCB) to investigate the properties of the four nitrogenous bases of guanine (G), thymine (T), cytosine (C) and adenine (A) in short polynucleotide form. Acquisition and analysis of the current-voltage (I-V) profiles allowed measurement of selected solid-state parameters corresponding to each of the DNA polynucleotide base. While observing characteristic I-V profiles and parameters, significantly closer and higher conductive profiles were demonstrated for the purines (A and G) as compared to the highly similar profiles of the pyrimidines (T and C) which is in agreement with previous observations. The observations obtained from this work may, therefore, provide a clear conceptualization of the role of each nitrogenous base in charge transfer process through the DNA molecule and allow better understanding of the fingerprinting electronic properties of each base.

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Metal–insulator transition in DNA molecules induced by long-range correlations in the sequence of nucleotides

Cited by 14 publications

References 37 publications

Disorder-induced delocalization in quantum wires: One-dimensional tight-binding ideal chain

Disorder-induced delocalization in quantum wires: One-dimensional tight-binding ideal chain

Finite size effects in infinitely large electronic systems with correlated disorders

Electronic Properties of Short Polynucleotides Studied Using Schottky Junctions

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