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Periodic Potentials and the Kronig-Penney Model
Teaching Materials | 01 Jul 2008 | Contributor(s):: Dragica Vasileska
This material describes the derivation of the Kronig-Penney model for delta-function periodic potentials.
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Quantum-Mechanical Reflections in Nanodevices: an Exercise
Teaching Materials | 02 Jul 2008 | Contributor(s):: Dragica Vasileska, Gerhard Klimeck
This exercise points out to the fact that quantum-mechanical reflections are going to be significant in nanoscale devices and proper modeling of these device structures must take into consideration the quantum-mechanical reflections. NSF, ONR Dragica Vasileska personal web-site...
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Periodic Potentials and Bandstructure: an Exercise
Teaching Materials | 02 Jul 2008 | Contributor(s):: Dragica Vasileska, Gerhard Klimeck
This exercise teaches the students that in the case of strong coupling between the neighboring wells in square and Coulomb periodic potential wells electrons start to behave as free electrons and the gaps that open at the Brillouin zone boundaries become smaller and smaller (thus recovering the...
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From 1 well to 2 wells to 5 wells to periodic potentials: an Exercise
Teaching Materials | 02 Jul 2008 | Contributor(s):: Dragica Vasileska, Gerhard Klimeck
This exercise demonstrates that the interaction between the wells lifts the degeneracy of the quasi-bound states and if in the limit we have infinite periodic potential it leads to formation of energy bands. Notice that when the interaction is less strong the energy levels are more sharp and...
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Open Systems
Teaching Materials | 30 Jun 2008 | Contributor(s):: Dragica Vasileska
This tutorial contains introductory material for Quantum Mechanics for Engineers with emphasis on tunneling, open systems and the definitions of transmission and reflection coefficients and their calculation in the case of piece-wise constant potential energy profiles.NSF
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Double Barrier Case
Teaching Materials | 30 Jun 2008 | Contributor(s):: Dragica Vasileska
This material contains derivation for the transmission coefficient and current calculation in double-barrier structures that are also known as resonant tunneling diodes.
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Quantum-Mechanical Reflections: an Exercise
Teaching Materials | 30 Jun 2008 | Contributor(s):: Dragica Vasileska, Gerhard Klimeck
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Double-Barrier Case: An Exercise
Teaching Materials | 30 Jun 2008 | Contributor(s):: Dragica Vasileska, Gerhard Klimeck
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Coulomb Blockade Simulation
Tools | 05 Jul 2006 | Contributor(s):: Xufeng Wang, Bhaskaran Muralidharan, Gerhard Klimeck
Simulate Coulomb Blockade through Many-Body Calculations in a single and double quantum dot system
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Introduction to Quantum Dot Lab
Online Presentations | 31 Mar 2008 | Contributor(s):: Sunhee Lee, Hoon Ryu, Gerhard Klimeck
The nanoHUB tool "Quantum Dot Lab" allows users to compute the quantum mechanical "particle in a box" problem for a variety of different confinement shapes, such as boxes, ellipsoids, disks, and pyramids. Users can explore, interactively, the energy spectrum and orbital...
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Quantum Dot Spectra, Absorption, and State Symmetry: an Exercise
Teaching Materials | 30 Mar 2008 | Contributor(s):: Gerhard Klimeck
The tutorial questions based on the Quantum Dot Lab v1.0 available online at Quantum Dot Lab. Students are asked to explore the various different quantum dot shapes, optimize the intra-band absorption through geometry variations, and consider the concepts of state symmetry and eigenstates.
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Finite Height Quantum Well: an Exercise for Band Structure
Teaching Materials | 31 Jan 2008 | Contributor(s):: David K. Ferry
Use the Resonant Tunneling Diodes simulation tool on nanoHUB to explore the effects of finite height quantum wells. Looking at a 2 barrier device, 300 K, no bias, other standard variables, and 3 nm thick barriers and a 7 nm quantum well, determine the energies of the two lowest quasi-bound states.
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Periodic Potential Lab
Tools | 19 Jan 2008 | Contributor(s):: Abhijeet Paul, Junzhe Geng, Gerhard Klimeck
Solve the time independent schrodinger eqn. for arbitrary periodic potentials
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Quantum Dot Lab Learning Module: An Introduction
Online Presentations | 02 Jul 2007 | Contributor(s):: James K Fodor, Jing Guo
THIS MATERIAL CORRESPONDS TO AN OLDER VERSION OF QUANTUM DOT LAB THAN CURRENTLY AVAILABLE ON nanoHUB.org.
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Band Structure Lab
Tools | 19 May 2006 | 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
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Schred
Tools | 30 Mar 2006 | Contributor(s):: Dragica Vasileska, Shaikh S. Ahmed, Gokula Kannan, Matteo Mannino, Gerhard Klimeck, Mark Lundstrom, Akira Matsudaira, Junzhe Geng
SCHRED simulation software calculates the envelope wavefunctions and the corresponding bound-state energies in a typical MOS, SOS and a typical SOI structure.
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Resonant Tunneling Diodes: an Exercise
Teaching Materials | 06 Jan 2006 | Contributor(s):: H.-S. Philip Wong
This homework assignment was created by H.-S. Philip Wong for EE 218 "Introduction to Nanoelectronics and Nanotechnology" (Stanford University). It includes a couple of simple "warm up" exercises and two design problems, intended to teach students the electronic properties...
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Quantum Dot Lab
Tools | 12 Nov 2005 | 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.
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Resonant Tunneling Diode Simulator
Tools | 10 Oct 2005 | Contributor(s):: Michael McLennan
Simulate 1D resonant tunneling devices and other heterostructures via ballistic quantum transport
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Quantum Dots
Online Presentations | 21 Jul 2005 | 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...