samira Fathizadeh- Ph.D.
- Professor (Assistant) at Urmia University of Technology
samira Fathizadeh
- Ph.D.
- Professor (Assistant) at Urmia University of Technology
About
41
Publications
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Introduction
Current institution
Publications
Publications (41)
![(a) The spin-dependent currents I↑\documentclass[12pt]{minimal}...](publication/376183340/figure/fig2/AS:11431281209581975@1701804018446/a-The-spin-dependent-currents-Idocumentclass12ptminimal-usepackageamsmath_Q320.jpg)
![(a) The spin-dependent currents I↑\documentclass[12pt]{minimal}...](publication/376183340/figure/fig3/AS:11431281209557793@1701804018659/a-The-spin-dependent-currents-Idocumentclass12ptminimal-usepackageamsmath_Q320.jpg)
Motivated by the development of molecular spintronics, we studied the phonon-assisted spin transport along a DNA chain in the presence of environmental-induced dephasing using multifractal analysis. The results demonstrate that a nearly pure spin current is generated in the presence of the voltage gate. The pure spin current is enhanced by increasi...
![Time series of Φ(x,α,p)\documentclass[12pt]{minimal}...](publication/362788767/figure/fig3/AS:11431281093301685@1667184949426/Time-series-of-Phx-a-pdocumentclass12ptminimal-usepackageamsmath_Q320.jpg)
Many cryptographic schemes have been implemented, using the connection between chaos and cryptography. However, the present study introduces a new algorithm that, as a standard format, can be used in cyberspace. The substitution box (S-box) is one of the most successful examples of these strategies. However, most S-box design schemes contain a fixe...
Investigating the dynamical behavior of a system is an effective method to predict and control its future behavior. Studying the dynamic behavior of a virus can prevent the pathogenicity of a virus and save human lives during the disease epidemic. If the transmission of information from the virus genome to the environment is locked, the pathogenici...
The potential application of biological molecules as functional devices has been heralded as the dawn of a new field in biotechnology and medicine. In this regard, molecular motors have attracted the most attention for decades. In the current study, we have studied the bioenergy transfer in a protein chain as a self-powered nanomotor. The effect of...
Energy transport within biological systems is critical for biological functions in living cells and for technological applications in molecular motors. Biological systems have very complex dynamics supporting a large number of biochemical and biophysical processes. In the current work, we study the energy transport along protein chains. We examine...
Spin state switching of the DNA sequences due to external stimuli is investigated theoretically. A molecular-based memory or logic device such as a spin switch could be directly realized within an electronic circuit. The DNA system is subjected an electrical potential difference through the metal leads for controling the spin transport. The spectral...
Recent efforts have been focused on producing nanoscale spintronic systems based on molecular materials. Molecular spintronics is an exciting concept for spin-based quantum computing. Spintronics combines the electronic with electron spin, which is an attractive field for processing and transferring the information. On the other hand, creating the...
Photosynthesis is the most important photon-induced process to fuel the activities of the organism. In the current work, we have investigated the exciton energy transfer in a photosynthetic complex connected to a thermal bath using the quantum chaos approach. The statistical distribution of the energy levels of the system investigates a quasi-degen...
The spin-crossover phenomenon in molecular compounds is one of the bistable phenomena leading to switching between the high-spin and the low-spin states of the molecule which confers a memory effect on these systems. In this regard, we have tried to design and control a nanoscale spin switch based on DNA chains. We have used the magnetic field and...
Recent discoveries of phenomena involving the interaction of heat currents and spin currents have originated a vigorous field of spintronics, known as spincaloritronics. Meanwhile, creating the spin current via applying the temperature gradient attracts much attention among scientists. By using spin polarization, the spintronic phenomenon is able t...
Bio-based materials offer new potentialities for photodetection applications due to their sensitivity, selectivity and biocompatibility. The present paper proposes an energy transfer mechanism associated with the incident light frequency. Based on the premise that the competition between the electrical current and phonon flux determines the dominan...
Recently, there is a developing trend of using renewable bio-based materials as an energy storing device. Biomaterials are environmentally friendly as they do not contain chemical products, they operate silently due to the lack mechanical structures and/or moving parts.
Throughout the present paper, we have theoretically modeled a photosynthetic sy...
Molecular switches are of fundamental components for spin-based quantum computing. It is an extreme case of molecular electronics in which individual spins are used as the smallest possible logical electronic switches. Electronic devices operate on logic states, which are represented either by dynamic transport of matter or by the static configurat...
The design of a molecular switch that has bistable on/off states is of particular interest in molecular electronics. Motivated by experimental studies of molecular conductors, interplays of photons and electrons and their effects on electrical properties are studied theoretically. We have tried to design a molecular optical switch based on DNA sequ...
Modern research activities, both theoretical and experimental, inevitably deal with open quantum systems. On the other hand, in the emerging field of nanoelectronics, biosystems have drawn in the past decade the attention of both experimentalists and theoreticians. Flexibility, programmability, and not expensive synthesis of biosystems make them th...
Biosystems has been proved powerful for use in nanotechnology because of its predictable nanometer-sized structures. One important example is that we can use biosystems to develop the new two- and three-dimensional nanomachines and nanocircuits. To achieve this goal, people hope to control the conductivity properties of system. In this regard, ligh...
Applying the various environmental conditions to biological systems is a developing emerging field of study for creating spin currents. Recently, Investigation of temperature-driven spin currents has attracted a lot of attention of researchers. Spin currents are used for the process, preserve and secure transport of information in spintronics. Due...
Spin caloritronics, a novel and rich research field, combining spin, charge and heat transport in materials, provides alternative strategies for thermoelectric waste heat recovery, and the information technologies. Understanding of the spin transport properties of materials has important implications for spin-based devices. Flexibility, low cost, a...
DNA nanotechnology is a purist's approach to biomolecular engineering. The field aims to create molecular structures and devices through the exclusive use of DNA as an engineering material. On the other hand, creating of a molecular transistor as well as engineering its structure have become one of the greatest aims of scientists. We have focused o...
Molecule–based transistors have attracted most attention due to their exclusive properties. Creating of a molecular transistor as well as engineering its structure have become one of the greatest aims of scientists. We have focused on the environmental dependent behavior of a DNA–templated transistor. Using the statistical distribution of the energ...
The promise of molecular electronics has focused enormous interest on
molecular devices. Typically, such devices consist of an individual molecule trapped
between two leads, in–between which a voltage bias is applied. Here, we have attempted
to design a DNA based molecular transistor. Our aim is choosing the most
appropriate parameters such as DNA...
The advent of molecular electronics has fueled interest in studying DNA as a nanowire. The well–known Peyrard–
Bishop–Dauxois (PBD) model, which was proposed for the purpose of understanding the mechanism of DNA
denaturation, has a limited number of degrees of freedom. In addition, considering the Peyrard–Bishop–Holstein (PBH)
model as a means of s...
Molecular electronics is complementary to Silicon-based electronics and may induce electronic functions which are difficult to obtain with conventional technology. We have considered a DNA based molecular transistor and study its transport properties. The appropriate DNA sequence as a central chain in molecular transistor and the functional interva...
Experimental results show that the photoelectrons emitted from the gold substrate due to laser radiation, passe through DNA nanowires with spin-polarized nature. This study proposes the use of chiral DNA molecule in spintronics and information processing. To investigate the spin transfer in DNA molecules, we established a theoretical model based on...
A combined analytical approach is proposed to investigate the spin selectivity properties of DNA nanowires considering the spin degree of freedom in the extended Peyrard-Bishop-Holstein model. Based on a real chain of DNA sequence, show no completely pure spin current through DNA, but no complete pure spin exists in a DNA chain, but instead one of...
Conductivity properties of DNA molecule is investigated in a simple, chemically specific approach, that is intimately related to the Su-Schrieffer-Heeger (SSH) model. In the SSH model, the non-diagonal matrix element dependent on intersite displacements is considered and there is a coupling between the charge and lattice deformation along DNA helix...
An analytical approach is proposed for the investigation of the conductivity properties of DNA. The charge mobility of DNA is studied based on an extended Peyrard-Bishop-Holstein model when the charge carrier is also subjected to an external electrical field. We have obtained the values of some of the system parameters, such as the electron-lattice...
We present energy eigenvalues and corresponding eigenfunction of the relativistic Kemmer equation for Dirac oscillator. The
associated ladder operators being established, it is shown that these operators satisfy the commutation relation of the su(1,1)
group. Asuitable representation of this group is presented and analytical matrix elements of some...
Questions
Questions (2)
I have some coupled ODE equations and one of them goes to infinite and affects the other equations and they go to infinite. To avoid it, I try to take the logarithm from the output of that equation in every step of solving with Matlab code and insert the logarithmic value of it in the equations in next step. How can I do it in matlab ode code? How can I do it in a code that equations are discrete in time?
