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Author: Vinod Tewary

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1. Effect of elastic deformation on frictional properties of few-layer graphene
Published: 1/9/2012
Authors: Alexander Y. Smolyanitsky, Jason Philip Killgore, Vinod K Tewary
Abstract: We describe the results of Brownian dynamics (BD) simulations of an AFM tip scanned on locally suspended few-layer graphene. The effects of surface compliance and sample relaxation are directly related to the observed friction force. We demonstrate t ...

2. Graphene-metal interconnect: an atomistic simulation
Published: 8/11/2011
Authors: Alexander Y. Smolyanitsky, Vinod K Tewary
Abstract: We develop a set of computationally efficient and accurate interatomic interactions for an atomistic simulation of the properties of graphene on nickel surface. The approach is based on the modified embedded atom method (MEAM) for the C-C and Ni-Ni i ...

3. Simulation of lattice strain due to CNT-metal interface
Published: 1/17/2011
Authors: Alexander Y. Smolyanitsky, Vinod K Tewary
Abstract: We report an atomistic molecular statics study of strains in single wall carbon nanotubes (SWCNTs) interfaced with a planar nickel surface. We calculate axial and radial strain distributions along the SWCNT axis. We demonstrate strains of up to 2% ex ...

4. Singularity in the Debye-Waller factor of graphene
Published: 3/16/2009
Authors: Vinod K Tewary, B. Yang
Abstract: It is shown that the Debye-Waller factor for graphene has a singularity. However, the singularity does not affect the zero-temperature value of the Debye-Waller factor. We calculate the zero-temperature limit of the mean-square displacement separate ...

5. A parametric interatomic potential for graphene
Published: 2/27/2009
Authors: Vinod K Tewary, B. Yang
Abstract: A parametric interatomic potential is constructed for graphene. The potential energy consists of two parts: bond energy and radial interaction energy. The bond energy part is a generalized version of the Tersoff-Brenner potential. It includes angula ...

6. Green's Function for Multilayers with Interfacial Membrane and Flexural Rigidities
Published: 8/4/2008
Authors: B. Yang, Vinod K Tewary
Abstract: A three-dimensional Green's function for a material system containing general anisotropic and linearly elastic planar multilayers with interfacial membrane and flexural rigidities has been derived. The Stroh formalism and two-dimensional Fourier tran ...

7. Multiscale Green's function for deflection of graphene lattice
Published: 6/2/2008
Authors: B. Yang, Vinod K Tewary
Abstract: 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 ...

8. Multiscale Modeling of Lattice Defects in Si-Ge(001) Quantum Wells
Published: 4/9/2008
Authors: B. Yang, Vinod K Tewary
Abstract: 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 mo ...

9. Peridynamic Simulation of Electromigration
Published: 1/1/2008
Authors: David Thomas Read, Walter Gerstle, Stewart Silling, Vinod K Tewary, Richard Lehoucq
Abstract: 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 t ...

10. Multiscale modeling of point defects in strained silicon
Published: 12/31/2007
Authors: Vinod K Tewary, B. Yang
Abstract: 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, ...

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