Technology Trends as seen in Year 2011

24 Jun 2011 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck

In this presentations we discuss Nanotechnology Trends as seen in Year 2011.

Brillouin Zone Viewer

25 Jan 2011 | Tools | Contributor(s): Arun Goud Akkala, Sebastian Steiger, Hong-Hyun Park, Yosef Borga, Tillmann Christoph Kubis, Michael Povolotskyi, Gerhard Klimeck

Visualize Brillouin zones of different crystals and different unit cells

Periodic Potential Lab Worked Examples

09 Apr 2011 | Teaching Materials | Contributor(s): SungGeun Kim, Abhijeet Paul, Gerhard Klimeck, Lynn Zentner, Benjamin P Haley

Worked Examples for Periodic Potential Lab

Tutorial 4: Far-From-Equilibrium Quantum Transport

23 Mar 2011 | Courses | Contributor(s): Gerhard Klimeck

These lectures focus on the application of the theories using the nanoelectronic modeling tools NEMO 1- D, NEMO 3-D, and OMEN to realistically extended devices. Topics to be covered are realistic resonant tunneling diodes, quantum dots, nanowires, and Ultra-Thin-Body Transistors.

Tutorial 4a: High Bias Quantum Transport in Resonant Tunneling Diodes

23 Mar 2011 | Online Presentations | Contributor(s): Gerhard Klimeck

Outline: Resonant Tunneling Diodes - NEMO1D: Motivation / History / Key Insights Open 1D Systems: Transmission through Double Barrier Structures - Resonant Tunneling Introduction to RTDs: Linear Potential Drop Introduction to RTDs: Realistic Doping Profiles Introduction to RTDs: Relaxation …

Tutorial 4b: Introduction to the NEMO3D Tool - Electronic Structure and Transport in 3D

23 Mar 2011 | Online Presentations | Contributor(s): Gerhard Klimeck

Electronic Structure and Transport in 3D - Quantum Dots, Nanowires and Ultra-Thin Body Transistors

Tutorial 4c: Formation of Bandstructure in Finite Superlattices (Exercise Session)

23 Mar 2011 | Online Presentations | Contributor(s): Gerhard Klimeck

How does bandstructure occur? How large does a repeated system have to be? How does a finite superlattice compare to an infinite superlattice?

Tutorial 4d: Formation of Bandstructure in Finite Superlattices (Exercise Demo)

23 Mar 2011 | Online Presentations | Contributor(s): Gerhard Klimeck

Demonstration of the Piece-Wise Constant Potential Barriers Tool.

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 Dot Wave Function (Quantum Dot Lab)

02 Feb 2011 | Animations | Contributor(s): Gerhard Klimeck, David S. Ebert, Wei Qiao

Electron density of an artificial atom. The animation sequence shows various electronic states in an Indium Arsenide (InAs)/Gallium Arsenide (GaAs) self-assembled quantum dot.

Self-Assembled Quantum Dot Structure (pyramid)

01 Feb 2011 | Animations | Contributor(s): Gerhard Klimeck, Insoo Woo, Muhammad Usman, David S. Ebert

Pyramidal InAs Quantum dot. The quantum dot is 27 atomic monolayers wide at the base and 15 atomic monolayers tall.

Quantum Dot Wave Function (still image)

31 Jan 2011 | Animations | Contributor(s): Gerhard Klimeck, David S. Ebert, Wei Qiao

Electron density of an artificial atom. The image shown displays the excited electron state in an Indium Arsenide (InAs) / Gallium Arsenide (GaAs) self-assembled quantum dot.

Self-Assembled Quantum Dot Wave Structure

31 Jan 2011 | Animations | Contributor(s): Gerhard Klimeck, Insoo Woo, Muhammad Usman, David S. Ebert

A 20nm wide and 5nm high dome shaped InAs quantum dot grown on GaAs and embedded in InAlAs is visualized.

Electron Density in a Nanowire

30 Jan 2011 | Animations | Contributor(s): Gerhard Klimeck, Saumitra Raj Mehrotra

Electron Density in a circular Silicon nanowire transistor.

Tunneling in an Nanometer-Scaled Transistor

25 Jan 2011 | Animations | Contributor(s): Gerhard Klimeck, Mathieu Luisier, Neerav Kharche, George A. Howlett, Insoo Woo, David Ebert

Electrons tunneling through the gate of an ultra-scaled transistor.

MOSFET Lab - Scaling

02 Jan 2011 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, Gerhard Klimeck, Dragica Vasileska

The concept of device scaling and the need to control short channel effects is used in this real life problem

Atomistic Modeling and Simulation Tools for Nanoelectronics and their Deployment on nanoHUB.org

16 Dec 2010 | Online Presentations | Contributor(s): Gerhard Klimeck

At the nanometer scale the concepts of device and material meet and a new device is a new material and vice versa. While atomistic device representations are novel to device physicists, the semiconductor materials modeling community usually treats infinitely periodic structures. Two electronic …

MOSFET Worked out problems 1

06 Dec 2010 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, Gerhard Klimeck

Short channel effects in a MOSFET due to channel length scaling are highlighted in this worked out problem.

ABACUS: Test for MOSFET Tool

17 Oct 2010 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, 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 …

Verification of the Validity of the MOSFET Tool

10 Oct 2010 | Teaching Materials | 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.

Thermoelectric effects in semiconductor nanostructures: Role of electron and lattice properties

29 Sep 2010 | Online Presentations | Contributor(s): Abhijeet Paul, Gerhard Klimeck

This presentation covers some aspects of present development in the field of thermoelectricity and focuses particularly on the silicon nanowires as potential thermoelectric materials. The electronic and phonon dispersions are calculated and used for the calculation of thermoelectric properties in …

ABACUS: Test for BJT lab Tool

06 Oct 2010 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, Dragica Vasileska, Gerhard Klimeck

The objective of this test is to give an idea to a self-learning student 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 …

Verification of the Validity of the BJT Tool

22 Aug 2010 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, Dragica Vasileska, Gerhard Klimeck

A pnp BJT in Common-Base configuration is analyzed both analytically and numerically using BJT Lab. DC current gain and Output characteristics are computed.MATLAB script used is also available for download.

MOSCAP Worked out problems (Basic)

19 Aug 2010 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, Dragica Vasileska, Gerhard Klimeck

A simple MOSCAP is analyzed under different operation modes namely: Accumulation, near threshold and Inversion.

Drift Diffusion Lab Worked out problems (Drift)

16 Aug 2010 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, Dragica Vasileska, Gerhard Klimeck

This sample worked out problem illustrated the concept of mobility. Mobility values are computed for different material and doping levels.