
Computational Nanoscience, Lecture 12: InClass Simulation of Ising Model
28 Feb 2008  Teaching Materials  Contributor(s): Elif Ertekin, Jeffrey C Grossman
This is a two part lecture in which we discuss the spinspin correlation function for the the Ising model, correlation lengths, and critical slowing down. An inclass simulation of the 2D Ising Model is performed using the tool "Berkeley Computational Nanoscience Class Tools". We look at domain …

Computational Nanoscience, Lecture 11: Phase Transitions and the Ising Model
27 Feb 2008  Teaching Materials  Contributor(s): Elif Ertekin, Jeffrey C Grossman
In this lecture, we present an introduction to simulations of phase transitions in materials. The use of Monte Carlo methods to model phase transitions is described, and the Ising Model is given as an example for modeling the ferromagneticparamagnetic transition. Some of the subtleties of …

MSE 640 Lecture 4: Laue Diffraction and the Reciprocal Lattice
05 Mar 2008  Online Presentations  Contributor(s): Eric Stach

Computational Nanoscience, Lecture 10: Brief Review, Kinetic Monte Carlo, and Random Numbers
25 Feb 2008  Teaching Materials  Contributor(s): Elif Ertekin, Jeffrey C Grossman
We conclude our discussion of Monte Carlo methods with a brief review of the concepts covered in the three previous lectures. Then, the Kinetic Monte Carlo method is introduced, including discussions of Transition State Theory and basic KMC algorithms. A simulation of vacancymediated diffusion …

Computational Nanoscience, Lecture 18: Density Functional Theory and some Solid Modeling
21 Mar 2008  Teaching Materials  Contributor(s): Elif Ertekin, Jeffrey C Grossman
We continue our discussion of Density Functional Theory, and describe the mostoften used approaches to describing the exchangecorrelation in the system (LDA, GGA, and hybrid functionals). We discuss as well the strengths and weaknesses of the LDA and present some examples of its use. Finally, a …

Computational Nanoscience, Lecture 17: TightBinding, and Moving Towards Density Functional Theory
21 Mar 2008  Teaching Materials  Contributor(s): Elif Ertekin, Jeffrey C Grossman
The purpose of this lecture is to illustrate the application of the TightBinding method to a simple system and then to introduce the concept of Density Functional Theory. The motivation to mapping from a wavefunction to a densitybased description of atomic systems is provided, and the necessary …

Quantum and Semiclassical Electrostatics Simulation of SOI Trigates
19 Feb 2008  Tools  Contributor(s): HyungSeok Hahm, Andres Godoy
Generate quantum/semiclassical electrostatic simulation results for a simple Trigate structure

What Promises do Nanotubes and Nanowires Hold for Future Nanoelectronics Applications?
18 Feb 2008  Online Presentations  Contributor(s): Joerg Appenzeller
Various lowdimensional materials are currently explored for future electronics applications. The common ground
for all these structures is that the surface related impact can no longer be ignored – the common approach applied
to predict properties of bulktype threedimensional (3D) …

Computational Nanoscience, Homework Assignment 3: Molecular Dynamics Simulation of Carbon Nanotubes
14 Feb 2008  Teaching Materials  Contributor(s): Elif Ertekin, Jeffrey C Grossman
The purpose of this assignment is to perform molecular dynamics simulations to calculate various properties of carbon nanotubes using LAMMPS and Tersoff potentials.
This assignment is to be completed following lectures 5 and 6 using the "LAMMPS" program in the Berkeley Computational Nanoscience …

Computational Nanoscience, Lecture 1: Introduction to Computational Nanoscience
13 Feb 2008  Teaching Materials  Contributor(s): Jeffrey C Grossman, Elif Ertekin
In this lecture, we present a historical overview of computational science. We describe modeling and simulation as forms of "theoretical experiments" and "experimental theory". We also discuss nanoscience: "what makes nano nano?", as well as public perceptions of nanoscience and the "grey goo" …

Computational Nanoscience, Lecture 7: Monte Carlo Simulation Part I
15 Feb 2008  Teaching Materials  Contributor(s): Jeffrey C Grossman, Elif Ertekin
The purpose of this lecture is to introduce Monte Carlo methods as a form of stochastic simulation. Some introductory examples of Monte Carlo methods are given, and a basic introduction to relevant concepts in statistical mechanics is presented. Students will be introduced to the Metropolis …

Computational Nanoscience, Lecture 5: A Day of InClass Simulation: MD of Carbon Nanostructures
13 Feb 2008  Teaching Materials  Contributor(s): Jeffrey C Grossman, Elif Ertekin
In this lecture we carry out simulations inclass, with guidance from the instructors. We use the LAMMPS tool (within the nanoHUB simulation toolkit for this course). Examples include calculating the energy per atom of different fullerenes and nantubes, computing the Young's modulus of a nanotube …

Computational Nanoscience, Lecture 4: Geometry Optimization and Seeing What You're Doing
13 Feb 2008  Teaching Materials  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 …

MSE 582 Lecture 11: Overview of HighResolution TEM & Scanning TEM
14 Feb 2008  Online Presentations  Contributor(s): Eric Stach

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

Molecular Structure Tracer
05 Feb 2008  Tools  Contributor(s): Baudilio Tejerina
This tool provides a high quality display of molecular structures.

Illinois Tools: Effect of Doping on Semiconductors
01 Feb 2008  Teaching Materials  Contributor(s): Umberto Ravaioli, Nahil Sobh
This Java applet allows students to visualize the effects of doping on carrier concentration in bulk silicon. It utilizes the nondegenerate Maxwell statistics to explore the effects of doping and temperature on carrier concentration and the energy band diagram.
Developed in conjunction with …

Computational Nanoscience, Lecture 2: Introduction to Molecular Dynamics
30 Jan 2008  Teaching Materials  Contributor(s): Jeffrey C Grossman, Elif Ertekin
In this lecture, we present and introduction to classical molecular dynamics. Approaches to integrating the equations of motion (Verlet and other) are discussed, along with practical considerations such as choice of timestep. A brief discussion of interatomic potentials (the pair potential and …

Semiconductor Device Education Material
28 Jan 2008  Teaching Materials  Contributor(s): Gerhard Klimeck
This page has moved to "a Wiki page format"
When we hear the words, semiconductor device, we may think first of the transistors in PCs or video game consoles, but transistors are the basic component in all of the electronic devices we use in our daily lives. Electronic systems are built from …

Carbon nanotube based NEMS with cantilever structure
28 Jan 2008  Tools  Contributor(s): Pradeep Kumar Gudla, Aswin Kannan, Zhi Tang, Narayan Aluru
Simulates pullin behavior of Carbon nanotube based NEMS with cantilever boundary conditions, with and without Vander Waal's effect