Resonant Tunneling Diode Simulation with NEGF: First-Time User Guide
Teaching Materials | 01 Jun 2009 | Contributor(s): Samarth Agarwal, Gerhard Klimeck
This first-time user guide for Resonant Tunneling Diode Simulation with NEGF provides some fundamental concepts regarding RTDs along with details on how device geometry and simulation parameters influence current and charge distribution inside the device.NCN@Purdue
Quantum Dot Spectra, Absorption, and State Symmetry: an Exercise
0.0 out of 5 stars
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.
Bulk Band Structure: a Simulation Exercise
Teaching Materials | 03 Aug 2008 | Contributor(s): Dragica Vasileska, Gerhard Klimeck
This simulation exercise teaches the students about band structure of indirect and direct bandgap materials, the optical gaps, the concept of the effective mass and the influence of spin-orbit coupling on the valence bandstructure. NSF
Tight Binding Parameters by DFT mapping
Presentation Materials | 12 Sep 2012 | Contributor(s): Yaohua Tan, Michael Povolotskyi, Tillmann Christoph Kubis, Yu He, Zhengping Jiang, Timothy Boykin, Gerhard Klimeck
The Empirical Tight Binding(ETB) method is widely used in atomistic device simulations. The reliability of such simulations depends very strongly on the choice of basis sets and the ETB parameters. The traditional way of obtaining the ETB parameters is by fitting to experiment data,or critical...
Band Structure Lab Exercise
Teaching Materials | 28 Jun 2010 | Contributor(s): Gerhard Klimeck, Parijat Sengupta, Dragica Vasileska
Investigations of the electron energy spectra of solids form one of the most active fields of research. Knowledge of band theory is essential for application to specific problems such as Gunn diodes, tunnel diodes, photo-detectors etc. There are several standard methods to compute the band...
Homework Exercise on Bravais Lattices, Crystal Structures, Miller Indices
Teaching Materials | 30 Mar 2008 | Contributor(s): Abhijeet Paul, Gerhard Klimeck
The tutorial questions based on Crystal Viewer Lab v1.0 available online at Crystal Viewer Lab. Students are asked to explore different Bravais lattices, crystal structures, and Miller indices. Reference / course book: Semiconductor Device Fundamentals by Robert E. PierretNCN@Purdue
OMEN Nanowire: First-Time User Guide
5.0 out of 5 stars
Teaching Materials | 21 Feb 2009 | Contributor(s): SungGeun Kim, Benjamin P Haley, Mathieu Luisier, Saumitra Raj Mehrotra, Gerhard Klimeck
This is the first-time user guide for OMEN Nanowire. In addition to showing how the tool operates, it briefly explains what the OMEN Nanowire is, what it can do, and the input and output relationship.NCN@Purdue[1] Sung Dae Suk, et. al., IEDM, 2005, "High Performance 5nm radius Twin Silicon...
Investigation of the Electrical Characteristics of Triple-Gate FinFETs and Silicon-Nanowire FETs
Online Presentations | 08 Aug 2006 | Contributor(s): Monica Taba, Gerhard Klimeck
Electrical characteristics of various Fin field-effect transistors (FinFETs) and silicon-nanowires were analyzed and compared using a modified three-dimensional self-consistent quantum-mechanical simulator in order to investigate device performance. FinFETs have been proposed to fulfill the...
Nanoelectronic Modeling Lecture 08: Introduction to Bandstructure Engineering II
Online Presentations | 30 Dec 2009 | Contributor(s): Gerhard Klimeck
This presentation provides a brief overview of the concepts of bandstructure engineering and its potential applications to light detectors, light emitters, and electron transport devices. Critical questions of the origin of bandstructure and its dependence on local atom arrangements are raised to...
PN Diode Exercise: Graded Junction
Teaching Materials | 06 Jul 2008 | Contributor(s): Dragica Vasileska, Gerhard Klimeck
An exercise in determining the preferred approach to solving the Poisson equation.
Nanoelectronic Modeling Lecture 10: Open 1D Systems - Transmission through & over 1 Barrier
Online Presentations | 30 Dec 2009 | Contributor(s): Gerhard Klimeck, Dragica Vasileska, Samarth Agarwal
Tunneling and interference are critical in the understanding of quantum mechanical systems. The 1D time independent Schrödinger equation can be easily solved analytically in a scattering matrix approach for a system of a single potential barrier. The solution is obtained by matching wavefunction...
Nanoelectronic Modeling Lecture 41: Full-Band and Atomistic Simulation of Realistic 40nm InAs HEMT
Online Presentations | 08 Jul 2010 | Contributor(s): Gerhard Klimeck, Neerav Kharche, Neophytos Neophytou, Mathieu Luisier
This presentation demonstrates the OMEN capabilities to perform a multi-scale simulation of advanced InAs-based high mobility transistors.Learning Objectives:Quantum Transport Simulator Full-Band and Atomistic III-V HEMTs Performance Analysis Good Agreement with Experiment Some Open Issues...
MOSCAP - Theoretical Exercises 1
Teaching Materials | 02 Aug 2008 | Contributor(s): Dragica Vasileska, Gerhard Klimeck
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...
Development of a Nanoelectronic 3-D (NEMO 3-D ) Simulator for Multimillion Atom Simulations and Its Application to Alloyed Quantum Dots
Papers | 14 Jan 2008 | Contributor(s): Gerhard Klimeck, Timothy Boykin
Material layers with a thickness of a few nanometers are common-place in today’s semiconductordevices. Before long, device fabrication methods will reach a point at which the other two devicedimensions are scaled down to few tens of nanometers. The total atom count in such deca-nanodevices is...
NEMO5 Tutorial 6A: Device Simulation - Transport (Double Gate)
Online Presentations | 18 Jul 2012 | Contributor(s): Mehdi Salmani Jelodar, Seung Hyun Park, Zhengping Jiang, Tillmann Christoph Kubis, Michael Povolotskyi, Gerhard Klimeck
…
ABACUS: Test for PN Junction Lab
Teaching Materials | 05 Aug 2010 | Contributor(s): Dragica Vasileska, Gerhard Klimeck
The objective of this test is to give an idea to a self-learning students or to instructors in the case this test is used in a classroom the level of understanding of this topic when students have gone through the learning material, worked exercises and have completed the assignments and the...
Tunneling Through Triangular Barrier: an Exercise for PCPBT
Teaching Materials | 23 Jul 2008 | Contributor(s): Dragica Vasileska, Gerhard Klimeck
This exercise teaches the users that a very good result can be obtained when the triangular barrier is approximated with 11 segment piece-wise constant potential barrier steps. www.eas.asu.edu/~vasilesk NSF
Verification of the Validity of the MOSFET Tool
Teaching Materials | 10 Oct 2010 | Contributor(s): Saumitra Raj Mehrotra, Dragica Vasileska, Gerhard Klimeck
Output characteristics of a bulk MOSFET are computed using MOSFET lab and compared with an analytical model based on Bulk-Charge theory. Parasitic resistance is used as a fitting parameter in the analytical model. MATLAB script used for verification is also available for download.
Slides: WKB Approximation Applications
Teaching Materials | 09 Jul 2008 | Contributor(s): Dragica Vasileska, Gerhard Klimeck
www.eas.asu.edu/~vasileskNSF
Exercise: Crystal Lattices
Teaching Materials | 29 Jul 2008 | Contributor(s): Dragica Vasileska, Gerhard Klimeck
This exercise helps the student better understand various types of crystal lattices, in particular diamond and zinc-blende and also helps in better understanding of the miller indicies. The results to some of these problems can be easily arrived at by using the crystal viewer...
Nanoelectronic Modeling Lecture 14: Open 1D Systems - Formation of Bandstructure
Online Presentations | 25 Jan 2010 | Contributor(s): Gerhard Klimeck, Dragica Vasileska
The infinite periodic structure Kroenig Penney model is often used to introduce students to the concept of bandstructure formation. It is analytically solvable for linear potentials and shows critical elements of bandstructure formation such as core bands and different effective masses in...
MEMS Piezoelectric Vibrational Energy Harvesting Lab
Tools | 16 Jun 2014 | Contributor(s): Jorge Mario Monsalve, German Felipe Giraldo, Alba Graciela Avila, Gerhard Klimeck
Simulate the harvested electrical power from mechanical vibrations using a piezoelectric cantilevered beam
Nanoelectronic Modeling: Exercises 1-3 - Barrier Structures, RTDs, and Quantum Dots
Online Presentations | 27 Jan 2010 | Contributor(s): Gerhard Klimeck
Exercises:Barrier StructuresUses: Piece-Wise Constant Potential Barrier ToolResonant Tunneling DiodesUses: Resonant Tunneling Diode Simulation with NEGF • Hartree calculation • Thomas Fermi potentialQuantum DotsUses: Quantum Dot Lab • pyramidal dot
Nanoelectronic Modeling Lecture 33: Alloy Disorder in Bulk
Online Presentations | 07 Jul 2010 | Contributor(s): Gerhard Klimeck, Timothy Boykin, Chris Bowen
This presentation discusses disorder in AlGaAs unstrained systems in bulk. Bandstructure of an ideal simple unit cellWhat happens when there is disorder?Concept of a supercellBand folding in a supercellBand extraction from the concept of approximate bandstructureComparison of alloy disorder with...