3D wavefunctions
12 Apr 2010 | Animations | Contributor(s): Saumitra Raj Mehrotra, Gerhard Klimeck
In quantum mechanics the time-independent Schrodinger's equation can be solved for eigenfunctions (also called eigenstates or wave-functions) and corresponding eigenenergies (or energy levels) for a stationary physical system. The wavefunction itself can take on negative and positive values and...
Tunneling
30 Jul 2011 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck
This set of slides describes the quantum-mechanical process for tunneling and how it is accounted for in modeling semiconductor devices. We explain WKB approximation, transfer matrix approach and the Tsu-Esaki formula for the calculation of the current.
Carbon nanotube bandstructure
22 Apr 2010 | Animations | Contributor(s): Saumitra Raj Mehrotra, Gerhard Klimeck
Carbon nanotubes are allotropes of carbon with a cylindrical nanostructure, and can be categorized into single-walled nanotubes (SWNT) and multi-walled nanotubes (MWNT). These cylindrical carbon molecules have novel properties that make them potentially useful in many nanotechnology applications,...
Fermi-Dirac statistics with temperature
15 Apr 2010 | Animations | Contributor(s): Saumitra Raj Mehrotra, Gerhard Klimeck
Fermi-Dirac statistics is applied to identical particles with half-integer spin (such as electrons) in a system that is in thermal equilibrium. Since particles are assumed to have negligible mutual interactions, this allows a multi-particle system to be described in terms of single-particle...
Graphene nanoribbon bandstructure
17 Apr 2010 | Animations | Contributor(s): Saumitra Raj Mehrotra, Gerhard Klimeck
Graphene nanoribbons (often abbreviated as GNR) are planar strips of graphene with a thickness of approximately one atom. Carbon atoms in graphene are sp2-hybridized with a carbon-carbon bond length of approximately 0.142 nm. As an electronic material, graphene exhibits many desirable properties,...
Threshold voltage in a nanowire MOSFET
22 Apr 2010 | Animations | Contributor(s): Saumitra Raj Mehrotra, SungGeun Kim, Gerhard Klimeck
Threshold voltage in a metal oxide semiconductor field-effect transistor (better known as a MOSFET) is usually defined as the gate voltage at which an inversion layer forms at the interface between the insulating layer (oxide) and the substrate (body) of the transistor. A MOSFET is said to be...
Crystal Structure
11 Jul 2011 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck
This set of lecture notes describe crystalline structure and different types of crystal lattices.
MOSFet
30 Mar 2006 | Tools | Contributor(s): Shaikh S. Ahmed, Saumitra Raj Mehrotra, SungGeun Kim, Matteo Mannino, Gerhard Klimeck, Dragica Vasileska, Xufeng Wang, Himadri Pal, Gloria Wahyu Budiman
Simulates the current-voltage characteristics for bulk, SOI, and double-gate Field Effect Transistors (FETs)
Tight-Binding Band Structure Calculation Method
02 Jun 2010 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck
This set of slides describes on simple example of a 1D lattice, the basic idea behind the Tight-Binding Method for band structure calculation.
Band Structure Lab
19 May 2006 | Tools | Contributor(s): Samik Mukherjee, Kai Miao, Abhijeet Paul, Neophytos Neophytou, Raseong Kim, Junzhe Geng, Michael Povolotskyi, Tillmann Christoph Kubis, Arvind Ajoy, Bozidar Novakovic, James Fonseca, Hesameddin Ilatikhameneh, Sebastian Steiger, Michael McLennan, Mark Lundstrom, Gerhard Klimeck
Computes the electronic and phonon structure of various materials in the spatial configuration of bulk , quantum wells, and wires
Quantum Mechanics: Hydrogen Atom and Electron Spin
0.0 out of 5 stars
09 Jul 2008 | Series | Contributor(s): Dragica Vasileska, Gerhard Klimeck
A hydrogen atom is an atom of the chemical element hydrogen. The electrically neutral atom contains a single positively-charged proton and a single negatively-charged electron bound to the nucleus by the Coulomb force. The most abundant isotope, hydrogen-1, protium, or light hydrogen, contains no...
NEMO5 Tutorials (2012 Summer School)
19 Jul 2012 | Courses | Contributor(s): James Fonseca, Tillmann Christoph Kubis, Michael Povolotskyi, Jean Michel D Sellier, Parijat Sengupta, Junzhe Geng, Mehdi Salmani Jelodar, Seung Hyun Park, Gerhard Klimeck
While the general topics presented in the summer school materials are still applicable, many details have changed. If you are looking at these to learn how to use NEMO5, check out the newer materials here: https://nanohub.org/resources/21824
Quantum Mechanics: Periodic Potentials and Kronig-Penney Model
The Kronig-Penney model is a simple approximation of a solid. The potential consists of a periodic arrangement of delta functions, square well or Coulomb well potentials. By means of epitaxial growth techniques artificial semiconductor superlattices can be realized, which behave very similar to...
MOSCap
3.5 out of 5 stars
06 Apr 2006 | Tools | Contributor(s): Akira Matsudaira, Saumitra Raj Mehrotra, Shaikh S. Ahmed, Gerhard Klimeck, Dragica Vasileska
Capacitance of a MOS device
Quantum Mechanics: Hydrogen Atom
09 Jul 2008 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck
The solution of the Schrödinger equation (wave equations) for the hydrogen atom uses the fact that the Coulomb potential produced by the nucleus is isotropic (it is radially symmetric in space and only depends on the distance to the nucleus). Although the resulting energy eigenfunctions (the...
Quantum Dot Lab
4.5 out of 5 stars
12 Nov 2005 | Tools | Contributor(s): Prasad Sarangapani, James Fonseca, Daniel F Mejia, James Charles, Woody Gilbertson, Tarek Ahmed Ameen, Hesameddin Ilatikhameneh, Andrew Roché, Lars Bjaalie, Sebastian Steiger, David Ebert, Matteo Mannino, Hong-Hyun Park, Tillmann Christoph Kubis, Michael Povolotskyi, Michael McLennan, Gerhard Klimeck
Compute the eigenstates of a particle in a box of various shapes including domes, pyramids and multilayer structures.
PN Diode Exercise: Series Resistance
06 Jul 2008 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck
An exercise in determining the series resistance in a PN diode.
Graphite
09 Apr 2010 | Animations | Contributor(s): Saumitra Raj Mehrotra, Gerhard Klimeck
Graphene is a one-atom-thick planar sheet of sp2-bonded carbon atoms that are densely packed in a honeycomb crystal lattice. Graphene sheets are weakly bonded to other graphene layers above and below to form Graphite. The difference between two layers is approximately 0.335 nm [1].Graphite can...
Resonant Tunneling Diode operation
A resonant tunneling diode (RTD) is a type of diode with a resonant tunneling structure that allows electrons to tunnel through various resonant states at certain energy levels. RTDs can be fabricated using many different types of materials (such as III-V, type IV, II-VI semiconductors) and...
CNTbands
14 Dec 2006 | Tools | Contributor(s): Gyungseon Seol, Youngki Yoon, James K Fodor, Jing Guo, Akira Matsudaira, Diego Kienle, Gengchiau Liang, Gerhard Klimeck, Mark Lundstrom, Ahmed Ibrahim Saeed
This tool simulates E-k and DOS of CNTs and graphene nanoribbons.
a TCAD Lab
4.0 out of 5 stars
29 Oct 2008 | Tools | Contributor(s): Gerhard Klimeck, Dragica Vasileska
An Assembly of TCAD tools for circuit, device, and process simulation
Additional Tutorials on Selected Topics in Nanotechnology
23 Mar 2011 | Workshops | Contributor(s): Gerhard Klimeck, Umesh V. Waghmare, Timothy S Fisher, N. S. Vidhyadhiraja
Select tutorials in nanotechnology, a part of the 2010 NCN@Purdue Summer School: Electronics from the Bottom Up.
Quantum Dots
21 Jul 2005 | Online Presentations | Contributor(s): Gerhard Klimeck
Quantum Dots are man-made artificial atoms that confine electrons to a small space. As such, they have atomic-like behavior and enable the study of quantum mechanical effects on a length scale that is around 100 times larger than the pure atomic scale. Quantum dots offer application...
MOSFET - Theoretical Exercises
03 Aug 2008 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck
www.eas.asu.edu/~vasileskNSF
Band Structure Lab Demonstration: Bulk Strain
03 Jun 2009 | Animations | 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.