
DriftDiffusion Modeling and Numerical Implementation Details
01 Jun 2010  Teaching Materials  Contributor(s): Dragica Vasileska
This tutorial describes the constitutive equations for the driftdiffusion model and implementation details such as discretization and numerical solution of the algebraic equations that result from the finite difference discretization of the Poisson and the continuity equations.
vasileska.faculty.asu.edu
NSF

Physical and Analytical Description of the Operation of a PN Diode
01 Jun 2010  Teaching Materials  Contributor(s): Dragica Vasileska
A detailed physical and analytical description of the operation of PN diodes is given.
vasileska.faculty.asu.edu
NSF

Worked Examples for a PN Diode
01 Jun 2010  Teaching Materials  Contributor(s): Dragica Vasileska, Gerhard Klimeck
several worked examples are presented that illustrate the operation of a PN diode.

Numerical solution of the DriftDiffusion Equations for a diode
01 Jun 2010  Teaching Materials  Contributor(s): Dragica Vasileska
This material describes the implementation and also gives the source code for the numerical solution of the DriftDiffusion equations for a PN Diode. The code can be easily generalized for any 2D or 3D device.

Basics of Quantum Mechanics
01 Jun 2010  Teaching Materials  Contributor(s): Dragica Vasileska
Classical vs. Quantum physics, particlewave duality, postulates of quantum mechanics

Bound States and Open Systems
01 Jun 2010  Teaching Materials  Contributor(s): Dragica Vasileska
bound states, open systems, transfer matrix approach, gate leakage calculation in Schottky gates

Bulk Monte Carlo: Implementation Details and Source Codes Download
01 Jun 2010  Teaching Materials  Contributor(s): Dragica Vasileska, Stephen M. Goodnick
The Ensemble Monte Carlo technique has been used now for over 30 years as a numerical method to simulate nonequilibrium transport in semiconductor materials and devices, and has been the subject of numerous books and reviews. In application to transport problems, a random walk is generated to simulate the stochastic motion of particles subject to collision processes in some medium. This process of random walk generation may be used to evaluate integral equations and is connected to the …

Band Structure Calculation: General Considerations
17 May 2010  Teaching Materials  Contributor(s): Dragica Vasileska
This set of slides explains to the users the concept of valence vs. core electrons, the implications of the adiabatic approximation on the separation of the total Hamiltonian of the system and the meanfield approximation used in ab initio bandstructure approaches. It then gives systematic categorization of the ab initio and semiempirical electronic structure calculation methods. Finally it discusses the advantages and the disadvantages of the semiempirical methods (Empirical Pseudopotentials …

Renewable Energy Sources
17 May 2010  Teaching Materials  Contributor(s): Dragica Vasileska
This presentation in pictures describes possibilities and utilization of alternative (green) sources of energy. Many sources contributed in the creation of this presentation.
vasileska.faculty.asu.edu
NSF

Empirical Pseudopotential Method: Theory and Implementation
17 May 2010  Teaching Materials  Contributor(s): Dragica Vasileska
This tutorial first teaches the users the basic theory behind the Empirical Pseudopotential (EPM)Bandstructure Calculation method. Next, the implementation details of the method are described and finally a MATLAB implementation of the EPM is provided.
vasileska.faculty.asu.edu
NSF

Semiconductor Device Theory Exercises
30 Jul 2008  Teaching Materials  Contributor(s): Dragica Vasileska, Gerhard Klimeck, Mark Lundstrom
This collection of problems should help the students to better understand Semiconductor Device Physics on a fundamental and more complex level.
Crystal lattices and Miller indicies
From 1 well to 2 wells to 5 wells to periodic potentials
Periodic potentials and bandstructure
Bandstructure exercise
Simplified bandstructure model
Can we define unique effective masses in Si nanowires?
Density of states function calculation
Dopants and semiconductor statistics
General tool construction ...

SelfHeating Effects in NanoScale Devices. What do we know so far ...
10 Aug 2009  Teaching Materials  Contributor(s): Dragica Vasileska, Stephen M. Goodnick
This presentation contains the research findings related to selfheating effects in nanoscale devices in silicon on insulator devices obtained at Arizona State University. Different device technologies and different device geometries are being examined. Details of the theoretical model used in this study are also outlined.

From SemiClassical to Quantum Transport Modeling: What is Computational Electronics?
10 Aug 2009  Teaching Materials  Contributor(s): Dragica Vasileska
This set of powerpoint slides series provides insight on what are the tools available for modeling devices that behave either classically or quantummechanically. An indepth description is provided to the approaches with emphasis on the advantages and disadvantages of each approach. Conclusions are drawn about the applicability of each approach. There are additional teaching materials that can be found on the nanohub that give more indepth knowledge about each topic being addressed in this ...

From SemiClassical to Quantum Transport Modeling: DriftDiffusion and Hydrodynamic Modeling
10 Aug 2009  Teaching Materials  Contributor(s): Dragica Vasileska
This set of powerpoint slides series provides insight on what are the tools available for modeling devices that behave either classically or quantummechanically. An indepth description is provided to the approaches with emphasis on the advantages and disadvantages of each approach. Conclusions are drawn about the applicability of each approach. There are additional teaching materials that can be found on the nanohub that give more indepth knowledge about each topic being addressed in this ...

From SemiClassical to Quantum Transport Modeling: ParticleBased Device Simulations
10 Aug 2009  Teaching Materials  Contributor(s): Dragica Vasileska
This set of powerpoint slides series provides insight on what are the tools available for modeling devices that behave either classically or quantummechanically. An indepth description is provided to the approaches with emphasis on the advantages and disadvantages of each approach. Conclusions are drawn about the applicability of each approach. There are additional teaching materials that can be found on the nanohub that give more indepth knowledge about each topic being addressed in this ...

From SemiClassical to Quantum Transport Modeling: Quantum Corrections to Semiclassical Approaches
10 Aug 2009  Teaching Materials  Contributor(s): Dragica Vasileska
This set of powerpoint slides series provides insight on what are the tools available for modeling devices that behave either classically or quantummechanically. An indepth description is provided to the approaches with emphasis on the advantages and disadvantages of each approach. Conclusions are drawn about the applicability of each approach. There are additional teaching materials that can be found on the nanohub that give more indepth knowledge about each topic being addressed in this ...

From SemiClassical to Quantum Transport Modeling: Quantum Transport  Usuki Method and Theoretical Description of Green's Functions
10 Aug 2009  Teaching Materials  Contributor(s): Dragica Vasileska
This set of powerpoint slides series provides insight on what are the tools available for modeling devices that behave either classically or quantummechanically. An indepth description is provided to the approaches with emphasis on the advantages and disadvantages of each approach. Conclusions are drawn about the applicability of each approach. There are additional teaching materials that can be found on the nanohub that give more indepth knowledge about each topic being addressed in this ...

From SemiClassical to Quantum Transport Modeling: Quantum Transport  Recursive Green's function method, CBR approach and Atomistic
10 Aug 2009  Teaching Materials  Contributor(s): Dragica Vasileska
This set of powerpoint slides series provides insight on what are the tools available for modeling devices that behave either classically or quantummechanically. An indepth description is provided to the approaches with emphasis on the advantages and disadvantages of each approach. Conclusions are drawn about the applicability of each approach. There are additional teaching materials that can be found on the nanohub that give more indepth knowledge about each topic being addressed in this ...

Tutorial for PADRE Based Simulation Tools
10 Aug 2009  Teaching Materials  Contributor(s): Dragica Vasileska, Gerhard Klimeck
This tutorial is intended for first time and medium level users of PADREbased simulation modules installed on the nanohub. It gives clear overview on the capabilities of each tool with emphasis to most important effects occuring in nanoscale devices.

Exercise for MOS Capacitors: CV curves and interface and Oxide Charges
03 Aug 2009  Teaching Materials  Contributor(s): Dragica Vasileska, Gerhard Klimeck
This exercise is designed to teach the students how the CV curves of an ideal MOS Capacitor change in the presence of oxide or interface charges.

Exercise for MOSFET Lab: Long Channel vs. Short Channel Device
03 Aug 2009  Teaching Materials  Contributor(s): Dragica Vasileska
In this exercise studentsare required to simulate long channel device for which the graduate channel approximation is valid and the short channel device for which velocity saturation effect starts to play significant role.

Exercise for MOSFET Lab: DIBL Effect
03 Aug 2009  Teaching Materials  Contributor(s): Dragica Vasileska, Gerhard Klimeck
In this exercise students are required to examine the drain induced barrier lowering (DIBL) effect in short channel MOSFET devices.

Exercise for MESFET: Theoretical Exercises
03 Aug 2009  Teaching Materials  Contributor(s): Dragica Vasileska, Gerhard Klimeck
These theoretical exercises should help the student in understanding the operation of a MESFET device.

Exercise for MESFET: Simulation Exercise
03 Aug 2009  Teaching Materials  Contributor(s): Dragica Vasileska, Gerhard Klimeck
This simulation exercise is designed to illustrate the operation of a MESFET device for different doping of the active region.

MOSCAP: Theoretical Exercise  High Frequency CV Curves
07 Jul 2009  Teaching Materials  Contributor(s): Dragica Vasileska
One is required to sketch the high frequency CV curves for different MOS Capacitors configurations.