
Ripples and Warping of Graphene: A Theoretical Study
08 Jun 2010   Contributor(s):: Umesh V. Waghmare
We use firstprinciples density functional theory based analysis to understand formation of ripples in graphene and related 2D materials. For an infinite graphene, we show that ripples are linked with a low energy branch of phonons that exhibits quadratic dispersion at long wavelengths. Many...

nanoMATERIALS SeqQuest DFT
04 Feb 2008   Contributor(s):: Ravi Pramod Kumar Vedula, Greg Bechtol, Benjamin P Haley, Alejandro Strachan
DFT calculations of materials

Takuya Noguchi
http://nanohub.org/members/39457

ABINIT: FirstTime User Guide
09 Jun 2009   Contributor(s):: Benjamin P Haley
This firsttime user guide provides an introduction to using ABINIT on nanoHUB. We include a very brief summary of Density Functional Theory along with a tour of the Rappture interface. We discuss the default simulation (what happens if you don't change any inputs, and just hit "simulate") as...

Real space firstprinciples semiempirical pseudopotentials for Fe/MgO/Fe
03 Dec 2008   Contributor(s):: Kirk Bevan
A set of semiempirical pseudopotentials for the atomistic modeling of Fe/MgO/Fe tunnel junctions. See the attached document for a full description of their derivation and the modeling approach.Document Abstract:We present a real space density functional theory (DFT) localized basis set...

MSE 597G Lecture 6: Interatomic potentials III
12 Nov 2008   Contributor(s):: Alejandro Strachan
Reactive force fields,Parameterization of interatomic potentials

Northwestern University Initiative for Teaching Nanoscience
12 Aug 2008   Contributor(s):: Baudilio Tejerina
This package allows users to study and analyze of molecular properties using various electronic structure methods.

ABINIT
13 May 2004   Contributor(s):: Amritanshu Palaria, Xufeng Wang, Benjamin P Haley, Matteo Mannino, Gerhard Klimeck
Run the community code ABINIT for electronic structure calculations under density functional theory through a convenient graphical user interface

Theoretical Electron Density Visualizer
01 Jul 2008   Contributor(s):: Baudilio Tejerina
TEDVis calculates and displays 3D maps of molecular ED and its derivatives from the wave function.

Vitaliy Gorbenko
http://nanohub.org/members/29132

BNC Annual Research Review: An Introduction to PRISM and MEMS Simulation
04 Jun 2008   Contributor(s):: Jayathi Murthy
This presentation is part of a collection of presentations describing the projects, people, and capabilities enhanced by research performed in the Birck Center, and a look at plans for the upcoming year.

Dynamics of Quantum Fluids: Path integral and Semiclassical Methods
21 May 2008   Contributor(s):: Nancy Makri
The interplay of manybody nonlinear interactions and quantum mechanical effects such as zeropoint motion or identical particle exchange symmetries lead to intriguing phenomena in lowtemperature fluids, some of which remain poorly understood. Recent advances in theory and methodology have...

"Ab Initio" Theory of Novel Micro and Nanolasers
19 May 2008   Contributor(s):: A. Douglas Stone
While the laser is one of the most important inventions of the past century and one of the most interesting and controllable nonlinear systems in physics, there is surprisingly little predictive theory of lasing properties. Predicting lasing thresholds and output power far above threshold in...

Matdcal
30 Jan 2008   Contributor(s):: Kirk Bevan
Nonequilibrium Green's Function Density Functional Theory Simulator

UV/Vis Spectra simulator
04 Mar 2008   Contributor(s):: Baudilio Tejerina
This tool computes molecular electronic spectra.

Calculating Resonances Using a Complex Absorbing Potential
13 Mar 2008   Contributor(s):: Robin Santra
The Siegert (or Gamow) wave function associated with a resonance state is exponentially divergent at large distances from the scattering target. A complex absorbing potential (CAP) provides a computationally simple and efficient technique for calculating the complex Siegert energy of a resonance...

CNDO/INDO
09 Oct 2007   Contributor(s):: Baudilio Tejerina, Jeff Reimers
Semiempirical Molecular Orbital calculations.

Computational Nanoscience, Lecture 4: Geometry Optimization and Seeing What You're Doing
13 Feb 2008   Contributor(s):: Jeffrey C Grossman, Elif Ertekin
In this lecture, we discuss various methods for finding the ground state structure of a given system by minimizing its energy. Derivative and nonderivative methods are discussed, as well as the importance of the starting guess and how to find or generate good initial structures. We also briefly...

Exploring Physical and Chemical control of molecular conductance: A computational study
31 Jan 2008   Contributor(s):: Barry D. Dunietz

Dynamics on the Nanoscale: Timedomain ab initio studies of quantum dots, carbon nanotubes and moleculesemiconductor interfaces
31 Jan 2008   Contributor(s):: Oleg Prezhdo
Device miniaturization requires an understanding of the dynamical response of materials on the nanometer scale. A great deal of experimental and theoretical work has been devoted to characterizing the excitation, charge, spin, and vibrational dynamics in a variety of novel materials, including...