Entropique Inc.

London, Canada

Entropique Inc.

London, Canada
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Yanyushkina N.N.,Volgograd State University | Belonenko M.B.,Entropique Inc.
Optics and Spectroscopy (English translation of Optika i Spektroskopiya) | Year: 2013

The wave equation for the electromagnetic field that propagates in carbon nanotubes with allowance for the proper nonlinearity of the medium is analyzed. An effective equation having the form of an analog of the classical sine-Gordon equation is obtained and analyzed numerically. The dependence of the pulse on the nonlinearity constant of the medium is revealed. The evolution of the electromagnetic pulse is studied. © 2013 Pleiades Publishing, Ltd.


Belonenko M.B.,Entropique Inc. | Lebedev N.G.,Volgograd State University | Yanyushkina N.N.,Volgograd State University | Zhukov A.V.,Entropique Inc. | And 3 more authors.
Solid State Communications | Year: 2011

Starting with the Dirac equation in a curved spacetime, applied for the description of the long-wave electrons in curved graphene nanoribbons, we calculated the electronic spectrum and the density of states. Based on the derived density of states we were able to compute the IV-characteristics of a nanoribbonmetal tunnel junction. The dependence on the geometric characteristics of a nanoribbon is revealed. © 2011 Elsevier Ltd. All rights reserved.


Basavaraju S.,Tensorcom | Verma A.,Texas A&M University-Kingsville | Morusupalli S.P.,Qualcomm | Buin A.K.,University of Waterloo | Buin A.K.,Entropique Inc.
Materials Express | Year: 2012

We report on the electrical response of small diameter silicon nanowire p-channel field effect transistors. The study was conducted using ensemble Monte Carlo simulation, where the band structure was calculated using tight-binding method, and the hole-phonon scattering rates were calculated using first-order perturbation theory and deformation potential approximation. Ohmic source and drain contacts were assumed. Device electrostatic conditions were calculated by solving Gauss Law in integral form in lieu of the traditional Poisson equation. The devices showed high drive current and ON/OFF current ratio, and a fast switching response. © 2012 by American Scientific Publishers.


Pak A.V.,Volgograd State University | Yanyushkina N.N.,Volgograd State University | Belonenko M.B.,Entropique Inc.
Bulletin of the Russian Academy of Sciences: Physics | Year: 2012

Maxwell equations describing an extremely short pulse propagating in impurity carbon nanotubes placed in a dispersive nonmagnetic medium are analyzed with allowance for the nonlinearity of the medium. The dependences of the magnetic field intensity on the initial pulse amplitude and the parameters of the medium are revealed. © Allerton Press, Inc., 2012.


Yanyushkina N.N.,Volgograd State University | Belonenko M.B.,Entropique Inc.
Technical Physics | Year: 2013

The Maxwell equations for the electromagnetic field that propagates in carbon nanotubes (CNTs) placed in dispersive nonmagnetic dielectric media are analyzed with allowance for the intrinsic nonlinearity of the medium. The dependences of the pulse on the initial pulse amplitude, dispersion constants, and nonlinearity are revealed. © 2013 Pleiades Publishing, Ltd.


Pak A.V.,Volgograd State University | Belonenko M.B.,Entropique Inc. | Belonenko M.B.,Volgograd Institute of Business
Physics of the Solid State | Year: 2013

The propagation of an ultrashort optical pulse in a multilayer structure formed by alternating graphene and boron nitride layers has been considered. Conduction electrons of this system have been described within the long-wavelength effective Hamiltonian in the case of low temperatures, and the electromagnetic field has been taken into account based on classical Maxwell's equations. The dependence of the evolution on the velocity and maximum amplitude of the ultrashort pulse has been revealed. © 2013 Pleiades Publishing, Ltd.


Belonenko M.B.,Entropique Inc. | Pak A.V.,Volgograd State University | Lebedev N.G.,Volgograd State University
Semiconductors | Year: 2013

The current-voltage characteristics of a tunneling contact between two graphene nanoribbons containing impurity atoms are obtained based on the previously calculated density of states. The dependences on the nanoribbon geometrical and energy characteristics are calculated. © 2013 Pleiades Publishing, Ltd.


Pak A.V.,Volgograd State University | Belonenko M.B.,Entropique Inc.
Physics of the Solid State | Year: 2013

The energy spectrum of electrons in doped graphene corresponding to the Landau levels in an external transverse magnetic field has been calculated in the low-energy approximation. The magnetic-field dependence of the electrical conductivity has been determined based on the derived dispersion relation of electrons in the doped graphene. The behavior of the conductivity has been analyzed for different impurity parameters, such as the hybridization potential and energy of adsorbed atoms. © 2013 Pleiades Publishing, Ltd.


Popov A.S.,Volgograd State University | Belonenko M.B.,Entropique Inc. | Lebedev N.G.,Volgograd State University | Zhukov A.V.,Entropique Inc. | And 3 more authors.
European Physical Journal D | Year: 2011

We consider the propagation of 2D solitary electromagnetic waves and their scattering on a lattice of metallic inhomogeneities in the system of carbon nanotubes (CNTs). The electromagnetic field is considered on the basis of Maxwell equations, and the electronic system of carbon nanotubes is treated by the Boltzmann equation in relaxation time approximation. We numerically analyze the derived effective equation and reveal an increase of spectral composition of the last electromagnetic wave. Some possible practical applications of the discovered effect are discussed. © 2011 EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg.


Belonenko M.B.,Entropique Inc. | Lebedev N.G.,Volgograd State University | Yanyushkina N.N.,Volgograd State University
Physics of the Solid State | Year: 2012

Propagation of extremely-short optical pulses that can be considered as discrete solitons in a system of graphene waveguides has been studied. The effective equation having the form of an analog of the classical sin-Gordon equation has been derived. The effects observed with varying the initial pulse width have been investigated © 2012 Pleiades Publishing, Ltd.

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