QUANTUM TRANSPORT THROUGH SINGLE PHENALENYL MOLECULE: EFFECT OF INTERFACE STRUCTURE

The electronic transport characteristics through a single phenalenyl molecule sandwiched between two metallic electrodes are investigated by using Green's function technique. A parametric approach, based on the tight-binding model, is used to study the transport characteristics through such molecular bridge system. The electronic transport properties are significantly influenced by (a) the molecule-to-electrodes interface structure and (b) the molecule-to-electrodes coupling strength.

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EFFECT OF ISOMERS ON QUANTUM TRANSPORT THROUGH MOLECULAR BRIDGE SYSTEM

International Journal of Modern Physics B ◽

10.1142/s0217979208038545 ◽

2008 ◽

Vol 22 (03) ◽

pp. 247-256 ◽

Cited By ~ 2

Author(s):

SANTANU K. MAITI

Keyword(s):

Transport Property ◽

Quantum Transport ◽

Green's Function ◽

Electronic Transport ◽

Relative Position ◽

Coupling Strength ◽

Function Technique ◽

Electronic Transport Property ◽

Molecular Bridge ◽

Bridge System

Quantum transport for different models of isomer molecules attached with two semi-infinite leads is studied on the basis of the Green's function technique. The electronic transport property is strongly affected by (a) the relative position of the atoms in these molecules and (b) the molecular coupling strength with the leads.

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ELECTRON TRANSPORT THROUGH MOLECULAR CHAINS

NANO ◽

10.1142/s1793292007000416 ◽

2007 ◽

Vol 02 (02) ◽

pp. 103-108 ◽

Cited By ~ 1

Author(s):

SANTANU K. MAITI

Keyword(s):

Steady State ◽

Electron Transport ◽

Shot Noise ◽

Coupling Strength ◽

Tight Binding ◽

Function Technique ◽

Current Fluctuations ◽

Tight Binding Model ◽

Binding Model ◽

Steady State Current

We study electron transport through molecular chains attached with two nonsuperconducting electrodes by the use of Green's function technique. Here, we do parametric calculations based on the tight-binding model to characterize the electron transport through such bridge systems and see that the transport properties are significantly affected by (a) the length of the molecular chain and (b) the molecule-to-electrode coupling strength. In this context, we also discuss the steady state current fluctuations, so-called shot noise, which is a consequence of the quantization of charge and is not directly available through conductance measurements.

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Quantum transport of vortices in a weakly dissipative ring threaded by an Aharonov-Casher flux: A tight-binding model

Physical Review B ◽

10.1103/physrevb.56.r11411 ◽

1997 ◽

Vol 56 (18) ◽

pp. R11411-R11414 ◽

Cited By ~ 1

Author(s):

Jian-Xin Zhu ◽

Z. D. Wang

Keyword(s):

Quantum Transport ◽

Tight Binding ◽

Tight Binding Model ◽

Binding Model

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Electronic Transport Properties of Graphite Acceptor Compounds

MRS Proceedings ◽

10.1557/proc-20-173 ◽

1982 ◽

Vol 20 ◽

Cited By ~ 1

Author(s):

Ian L. Spain ◽

Kenneth J. Volin

Keyword(s):

Transport Properties ◽

Physical Model ◽

Electronic Transport ◽

Tight Binding ◽

Zero Field ◽

Tight Binding Model ◽

Binding Model ◽

Electronic Transport Properties

ABSTRACTCalculations of the magnetoresistance of graphite acceptor compounds are made using a tight binding model for the carrier dispersion proposed by Blinowski et al, and measured values of the zero-field resistivity. It is shown that, if a reasonable physical model is used for the mobilities, the magnetoresistance cannot be fitted with two- or three-carrier models. Suggestions for the origin of the magnetoresistance are made.

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Magnetic Spin Susceptibility of Graphene in Ferromagnetic State: A Tight-Binding Model Study

SPIN ◽

10.1142/s2010324720500046 ◽

2020 ◽

Vol 10 (01) ◽

pp. 2050004

Author(s):

Sivabrata Sahu ◽

G. C. Rout

Keyword(s):

Coulomb Interaction ◽

Tight Binding ◽

High Energy ◽

Spin Susceptibility ◽

Function Technique ◽

Tight Binding Model ◽

Transfer Energy ◽

Binding Model ◽

Frequency Dependent ◽

Model Study

We report here a tight-binding model study of frequency-dependent ferromagnetic spin susceptibility of the graphene system. The tight-binding Hamiltonian consists of electron hoppings up to third-nearest-neighbors, substrate and impurity effects in the presence of Coulomb interaction of electrons separately at two in-equivalent A and B sub-lattices of graphene. To calculate magnetic susceptibility, we calculate the two-particle electron Green’s functions by using Zubarev’s double time Green’s function technique. The electron occupations at A and B sub-lattices for both up and down spins are computed numerically and self-consistently. The frequency-dependent real part of ferromagnetic susceptibility of the system is computed numerically by taking [Formula: see text] grid points of the electron momentum. The susceptibility displays a sharp peak at the neutron momentum transfer energy at low energies and another higher energy resonance peak appearing at substrate-induced gap. The [Formula: see text]-peak shifts to a higher energy with the increase of momentum [Formula: see text]. The susceptibility shows that the high energy peak shifts to higher energies due to the corresponding increase of substrate-induced gap observed experimentally. It is observed that the Coulomb interaction suppresses the substrate-induced gap, but the impurity doping at A site enhances the substrate-induced gap, while doping at B site suppresses it.

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