First-principles study of two-dimensional puckered and buckled honeycomb-like carbon sulfur systems
The stability and geometrical, mechanical, and electronic properties of monolayer carbon sulfur (CS) systems with honeycomb-like structure are studied by using first-principles calculations based on density functional theory. The results ...
A computational approach for investigating Coulomb interaction using Wigner–Poisson coupling
Entangled quantum particles, in which operating on one particle instantaneously influences the state of the entangled particle, are attractive options for carrying quantum information at the nanoscale. However, fully-describing entanglement in ...
The spin-polarized dwell time in a parallel double δ-magnetic-barrier nanostructure
The dwell time of electrons in a parallel double δ-magnetic-barrier (MB) nanostructure constructed by patterning an asymmetric ferromagnetic stripe on both the top and bottom of an InAs/AlxIn1−xAs heterostructure is calculated. Because the ...
Monte Carlo simulations of electron transport in 4H-SiC using the DFT-calculated density of states
- Janusz Wozny,
- Andrii Kovalchuk,
- Zbigniew Lisik,
- Jacek Podgorski,
- Piotr Bugalski,
- Andrzej Kubiak,
- Łukasz Ruta
We carry out Monte Carlo simulations of electron transport in 4H-silicon carbide (4H-SiC) based on the numerically calculated density of states (DOS) to obtain the electron mobility at low electric fields. From the results, it can be concluded ...
Effect of vacancy defects on the electronic transport properties of an Ag–ZnO–Pt sandwich structure
The effect of zinc and oxygen vacancy defects on the electronic transport properties of Ag(100)–ZnO(100)–Pt(100) sandwich structures is studied using density functional theory in combination with the nonequilibrium Green’s functional formalism. ...
Spintronic devices: a promising alternative to CMOS devices
The field of spintronics has attracted tremendous attention recently owing to its ability to offer a solution for the present-day problem of increased power dissipation in electronic circuits while scaling down the technology. Spintronic-based ...
Analytical model for quasi-ballistic transport in MOSFET including carrier backscattering
In this paper, a charge-based analytical model is proposed for double-gate MOSFETs working in the quasi-ballistic regime. The model includes both Lundstrom backscattering theory and conventional drift–diffusion theory. Both the theories are used ...
Effect of chemical modification on electronic transport properties of carbyne
Using density functional theory in combination with the Green’s functional formalism, we study the effect of surface functionalization on the electronic transport properties of 1D carbon allotrope—carbyne. We found that both hydrogenation and ...
DC performance analysis of III–V/Si heterostructure double gate triple material PiN tunneling graphene nanoribbon FET circuits with quantum mechanical effects
In this article, the electrical behavior of laterally grown novel short-channel III–V/Si heterostructure double gate triple material PiN tunneling graphene nanoribbon field effect transistor (DG-TM-PiN-TGNFET) has been studied based on their ...
A perfect electrically tunable graphene-based metamaterial absorber
In this paper, a metamaterial absorber based on graphene is proposed, designed and simulated numerically using multilayer structures. Before describing our work, the performance response of a three-layer structure is studied concerning one ...
GaN HEMT on Si substrate with diamond heat spreader for high power applications
Currently, the GaN-on-silicon high electron mobility transistor (HEMT) is a promising candidate to replace the Si Metal Oxide Semiconductor Field Effect Transistor (MOSFET) for high power electronics circuits. However, self-heating is still a ...
Characteristics of HTS inverted circular patches on anisotropic substrates
In this study, an efficient full-wave method is developed for characterizing the resonant frequencies, bandwidths, and quality factors of an inverted circular superconducting patch antenna. Our technique is based on the Galerkin procedure in the ...
Waveguide divider design based on null of electric field
Nowadays, the design of dividers is based on electromagnetic software that optimizes some geometric parameters to obtain the required performance. The choice of the geometry of the discontinuities contained in the divider and of the optimization ...
Numerical modeling of highly sensitive resonant detection of THz radiation using a multichannel dispersive plasmonic HEMT
The resonant detection of terahertz radiation using a dispersive AlN/GaN multichannel high-electron-mobility transistor (HEMT) is analyzed and modeled in this paper. The proposed full-wave model is based on the concurrent solution of the complete ...
Improvement of terahertz photoconductive antennas array using crossfingers structure
The purpose of this research is to improve terahertz photoconductive antenna arrays to enhance their output power. The improved arrays were designed based on crossfingers structure as a high power terahertz generator. The finite difference time ...
Micro-supercapacitor characteristics using a micro-ring space-time control circuit
A micro-ring space-time control circuit is proposed for micro-supercapacitor application. The center micro-ring circuit consists of sandwiched titanium dioxide (TiO2) thin film. The input light fed into the circuit via the input port is of 1.55 µm ...
Elementary reflected code converter using a silicon nitride-based microring resonator
This article presents a simple and unique design for the generation of an all-optical reflected code or Gray code converter using an optical microring resonator as a basic building block. The Si3N4 -based microring resonator is modulated using an ...
Random forests for statistical modeling of experimental data for CuBr vapor lasers used as brightness amplifiers
This study demonstrates the high capabilities of data mining and the random forest (RF) machine learning technique for processing experimental data in the field of laser equipment and technology and extracting significant information from these. ...
The development of a neural network model for the structural improvement of perovskite solar cells using an evolutionary particle swarm optimization algorithm
The revolution represented by third-generation photovoltaic devices relied on the discovery of various hybrid organic–inorganic perovskite materials to convert solar into electrical energy. One of the advantages of such cells is their low cost due ...
Accurate modeling and simulation of solar photovoltaic panels with simulink-MATLAB
A unique procedure to model and simulate a 36-cell-50 W solar panel using analytical methods has been developed. The generalized expression of solar cell equivalent circuit was validated and implemented, making no influential assumptions, under ...
Optimization and realization all-optical compact five-channel demultiplexer using 2D photonic crystal based hexagonal cavities
In this paper, a compact all-optical five-channel demultiplexer (DEMUX) using 2D photonic crystal hexagonal cavities is proposed. The proposed DEMUX comprises bus/drop waveguides, photonic crystal waveguides containing four consecutive 120° bends, ...
A theoretical investigation of the effect of the hole and electron transport materials on the performance of a lead-free perovskite solar cell based on CH3NH3SnI3
This study entails a theoretical investigation of the effect of the hole transport layer (HTL) and electron transport layer (ETL) materials on a lead-free perovskite solar cell based on methylammonium tin iodide (CH3NH3SnI3). The simulations of ...
Improvement of RF MEMS devices by spring constant scaling laws
The technology for radio frequency micro-electro-mechanical system (RF MEMS) is well established. In the next phase of miniaturization, RF MEMS transforming into RF nano-electro-mechanical system (NEMS) requires scaling laws. For MEMS devices, ...
Design and analysis of a MEMS pressure sensor with a bossed membrane and ancillary bi-functional frog arm structure for low pressure measurement
This work presents a micro-electromechanical system based novel piezoresistive pressure sensor with frog arm structure for low pressure measurements up to one psi. The structure has been proposed with the objective of alleviating the trade-off ...
Development of algorithms in open-source Elmer FEM for frequency response and biased modal analysis of MEMS cantilever
The characteristic of the microelectromechanical systems (MEMS) structures can be determined by using static, modal and harmonic analyses implemented with finite element method (FEM) software packages. In the current study, two different ...
A multiple-event propagation model in near-threshold combinational circuits using neural networks
Near-threshold computing (NTC) is a promising technique to reduce the power consumption of very large-scale integration (VLSI) designs. The continuous reductions in the supply voltage present reliability challenges for modern complementary metal–...
Nonlinear optimal control and synchronization for chaotic electronic circuits
To achieve control and synchronization of chaotic electronic circuits, a nonlinear optimal (H-infinity) control method is developed and is tested on Chua’s circuit. Although this electronic circuit is deterministic, for specific values of its ...