
Diffusion of holes and electrons
15 Apr 2010   Contributor(s):: Saumitra Raj Mehrotra, Gerhard Klimeck
Diffusion is a process of particles distributing themselves from regions of high to low concentrations. In semiclassical electronics these particles are the charge carriers (electrons and holes). The rate at which a carrier can diffuse is called diffusion constant with units of cm2/s. The...

FermiDirac statistics with temperature
15 Apr 2010   Contributor(s):: Saumitra Raj Mehrotra, Gerhard Klimeck
FermiDirac statistics is applied to identical particles with halfinteger spin (such as electrons) in a system that is in thermal equilibrium. Since particles are assumed to have negligible mutual interactions, this allows a multiparticle system to be described in terms of singleparticle...

3D wavefunctions
12 Apr 2010   Contributor(s):: Saumitra Raj Mehrotra, Gerhard Klimeck
In quantum mechanics the timeindependent Schrodinger's equation can be solved for eigenfunctions (also called eigenstates or wavefunctions) and corresponding eigenenergies (or energy levels) for a stationary physical system. The wavefunction itself can take on negative and positive values and...

Electronic band structure
12 Apr 2010   Contributor(s):: Saumitra Raj Mehrotra, Gerhard Klimeck
In solidstate physics, the electronic band structure (or simply band structure) of a solid describes ranges of energy in which an electron is "forbidden" or "allowed". The band structure is also often called the dispersion or the E(k) relationship. It is a mathematical relationship between the...

RTD with NEGF Demonstration: Basic RTD Asymmetric
12 Jun 2009   Contributor(s):: Gerhard Klimeck
This video shows the analysis of a 2 barrier Resonant Tunneling Diode (RTD) over 21 bias points using RTDLab. Several powerful features of this tool are demonstrated.

Band Structure Lab Demonstration: Bulk Strain
12 Jun 2009   Contributor(s):: Gerhard Klimeck
This video shows an electronic structure calculation of bulk Si using Band Structure Lab. Several powerful features of this tool are demonstrated.

Crystal Viewer Demonstration: Bravais Lattices
12 Jun 2009   Contributor(s):: Gerhard Klimeck, Benjamin P Haley
This video shows the exploration of several crystal structures using the Crystal Viewer tool. Several powerful features of this tool are demonstrated.

Crystal Viewer Demonstration: Bravais Lattices 2
12 Jun 2009   Contributor(s):: Gerhard Klimeck, Benjamin P Haley
This video shows the exploration of several crystal structures using the Crystal Viewer tool. Several powerful features of this tool are demonstrated

Crystal Viewer Demonstration: Various Crystal Systems
12 Jun 2009   Contributor(s):: Gerhard Klimeck, Benjamin P Haley
This video shows the use of the Crystal Viewer Tool to visualize several crystal systems, including Si, GaAs, C60 Buckyball, and a carbon nanotube. Crystal systems are rotated in 3D, zoomed in and out, and the lattice style changes from sticks and balls to lines to spheres.

MOSFet Demonstration: MOSFET Device Simulation and Analysis
11 Jun 2009   Contributor(s):: Gerhard Klimeck, Benjamin P Haley
This video shows the simulation and analysis of a MOSFET device using the MOSFet tool. Several powerful analytic features of this tool are demonstrated.

MOSCap Demonstration: MOS Capacitor Simulation
11 Jun 2009   Contributor(s):: Gerhard Klimeck, Benjamin P Haley
This video shows the simulation of a MOS capacitor using the MOSCAP tool. Several powerful analytic features of this tool are demonstrated.

PieceWise Constant Potential Barriers Tool Demonstration: Bandstructure Formation with Finite Superlattices
11 Jun 2009   Contributor(s):: Gerhard Klimeck, Benjamin P Haley
This video shows the simulation and analysis of a systems with a series of potential barriers. Several powerful analytic features of Piecewise Constant Potential Barrier Tool (PCPBT) are demonstrated.

Periodic Potential Lab Demonstration: Standard KroenigPenney Model
11 Jun 2009   Contributor(s):: Gerhard Klimeck, Benjamin P Haley
This video shows the simulation of a 1D square well using the Periodic Potential Lab. The calculated output includes plots of the allowed energybands, a table of the band edges and band gaps, plots of reduced and expanded dispersion relations, and plots comparing the dispersion relations to...

Quantum Dot Lab Demonstration: Pyramidal Qdots
11 Jun 2009   Contributor(s):: Gerhard Klimeck, Benjamin P Haley
This video shows the simulation and analysis of a pyramidshaped quantum dot using Quantum Dot Lab. Several powerful analytic features of this tool are demonstrated.

PN Junction Lab Demonstration: Asymmetric PN Junctions
11 Jun 2009   Contributor(s):: Gerhard Klimeck, Benjamin P Haley
This video shows the simulation and analysis of a several PN junctions using PN Junction Lab, which is powered by PADRE. Several powerful analytic features of this tool are demonstrated.

OMEN Nanowire Demonstration: Nanowire Simulation and Analysis
11 Jun 2009   Contributor(s):: Gerhard Klimeck, Benjamin P Haley
This video shows the simulation and analysis of a nanowire using OMEN Nanowire. Several powerful analytic features of this tool are demonstrated.

ParticleWave Duality: an Animation
07 Jul 2008   Contributor(s)::
This animation is publicly available at YouTube under http://www.youtube.com/watch?v=DfPeprQ7oGc

General Introduction to Nanotechnology
20 Apr 2007   Contributor(s):: HyungSeok Hahm
This is an 80 second movie clip. The camera zooms in from a computer to molecules with a narration.The design goals are  Give a smooth introduction to nanoworld Deliver ideas of how small nanoscale objects are with a zoomin Inform that nanotechnology is related to everyday thingsProduced...

Quantumdot Cellular Automata (QCA)  Memory Cells
03 Feb 2006   Contributor(s)::
Scientists and engineers are looking for completely different ways of storing and analyzing information. Quantumdot Cellular Automata are one possible solution. In computers of the future, transistors may be replaced by assemblies of quantum dots called Quantumdot Cellular Automata (QCAs).This...

Quantumdot Cellular Automata (QCA)  Logic Gates
03 Feb 2006   Contributor(s)::
An earlier animation described how "Quantumdot Cellular Automata" (QCAs) could serve as memory cells and wires. This animation contnues the story by describing how QCAs can be made into MAJORITY, OR, AND, and INVERTER logic gates.