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Search Publications by: Vinod Tewary (Fed)

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Displaying 26 - 50 of 59

Multiscale Green's function for deflection of graphene lattice

June 2, 2008
Author(s)
B. Yang, Vinod Tewary
Fundamental deflection behavior of an infinite two-dimensional graphene lattice subjected to a transverse point force has been analyzed using lattice statics and the continuum Green's functions. An analytic expression has been derived for the lattice

Multiscale Modeling of Lattice Defects in Si-Ge(001) Quantum Wells

April 9, 2008
Author(s)
B. Yang, Vinod Tewary
A computationally efficient hybrid Green¿s function (GF) technique is developed for multiscale modeling of lattice defects in a trilayer material system that links seamlessly the length scales from lattice (sub-nanometers) to continuum (bulk). The model

Peridynamic Simulation of Electromigration

January 1, 2008
Author(s)
David T. Read, Walter Gerstle, Stewart Silling, Vinod K. Tewary, Richard Lehoucq
A theoretical framework, based upon the peridynamic model, is presented for analytical and computational simulation of electromigration. The framework allows four coupled physical processes to be modeled simultaneously: mechanical deformation, heat

Multiscale modeling of point defects in strained silicon

December 31, 2007
Author(s)
Vinod Tewary, B. Yang
A multiscale Green's function method is described for modeling substitutional point defects and vacancies in strained silicon. The model seamlessly links the length scales from atomistic to macro. The model accounts for the discrete lattice effects

Multiscale Model of Germanium Quantum Dots in Silicon

March 1, 2007
Author(s)
David T. Read, Vinod Tewary
Atomic displacements, strains and strain energies in the neighborhood of near-spherical, coherent germanium ¿quantum dots¿ (QD) in crystalline silicon and near a 001} Si surface have been predicted by multiscale modeling, using a combination of classical

Multiscale Modeling of Germanium Quantum Dots in Silicon

December 30, 2005
Author(s)
Vinod Tewary, David T. Read
A method is described for multiscale modeling of a quantum dot in a semiconductor containing a free surface. The method is based upon the use of the lattice-statics and continuum Green's functions integrated with classical molecular dynamics. It fully

Multiscale Modeling of Mechanical Response of Quantum Nanostructures

May 1, 2004
Author(s)
Vinod K. Tewary, B Yang
A multiscale Green's function method is described for modeling the mechanical response of quantum nanostructures in semiconductors. The method accounts for the discreteness of the lattice in and around the nanostructure, and uses the continuum Green's

Elastic Properties of Hardness Coatings Using Surface Acoustic Wave Spectroscopy

October 1, 2002
Author(s)
Donna C. Hurley, A J. Richards, Vinod K. Tewary, A Bendavid, P J. Martin
Surface acoustic wave (SAW) spectroscopy is a nondestructive way to determine the properties of thin films. Plane-wave SAWs are generated by a line-focused, pulsed laser and detected by a Michelson interferometer. Phase velocity dispersion relations over