Comparison of PCPBT Lab and Periodic Potential Lab

10 Aug 2009 | Online Presentations | Contributor(s): Abhijeet Paul, Samarth Agarwal, Gerhard Klimeck, Junzhe Geng

This small presentation provides information about the comparison performed for quantum wells made of GaAs and InAs in two different tools. This has been done to benchmark the results from completely …

https://nanohub.org/resources/7201

Nanoelectronic Modeling Lecture 12: Open 1D Systems - Transmission through Double Barrier Structures - Resonant Tunneling

27 Jan 2010 | Online Presentations | Contributor(s): Gerhard Klimeck, Dragica Vasileska

This presentation shows that double barrier structures can show unity transmission for energies BELOW the barrier height, resulting in resonant tunneling. The resonance can be associated with a …

https://nanohub.org/resources/8195

Nanoelectronic Modeling Lecture 16: Introduction to RTDs - Realistic Doping Profiles

27 Jan 2010 | Online Presentations | Contributor(s): Gerhard Klimeck

Realistic RTDs need extremely high doping to provide enough carriers for high current densities. However, Impurity scattering can destroy the RTD performance. The dopants are therefore typically …

https://nanohub.org/resources/8199

Nanoelectronic Modeling Lecture 17: Introduction to RTDs - Relaxation Scattering in the Emitter

27 Jan 2010 | Online Presentations | Contributor(s): Gerhard Klimeck

Realistic RTDs will have nonlinear electrostatic potential in their emitter. Typically a triangular well is formed in the emitter due to the applied bias and the emitter thus contains discrete quasi …

https://nanohub.org/resources/8200

Nanoelectronic Modeling Lecture 18: Introduction to RTDs - Quantum Charge Self-Consistency (Hartree)

27 Jan 2010 | Online Presentations | Contributor(s): Gerhard Klimeck

In this semi-classical charge and potential model the quantum mechanical simulation is performed once and the quantum mechanical charge is in general not identical to the semi-classical charge.

https://nanohub.org/resources/8201

Nanoelectronic Modeling Lecture 19: Introduction to RTDs - Asymmetric Structures

27 Jan 2010 | Online Presentations | Contributor(s): Gerhard Klimeck

This lecture explores this effect in more detail by targeting an RTD that has a deliberate asymmetric structure. The collector barrier is chosen thicker than the emitter barrier. With this set-up …

https://nanohub.org/resources/8202

Nanoelectronic Modeling nanoHUB Demo 1: nanoHUB Tool Usage with RTD Simulation with NEGF

09 Mar 2010 | Online Presentations | Contributor(s): Gerhard Klimeck

Demonstration of running tools on the nanoHUB. Demonstrated is the RTD Simulation with NEGF Tool using a simple level-drop potential model and a more realistic device using a Thomas-Fermi potential …

https://nanohub.org/resources/8318

Nanoelectronic Modeling nanoHUB Demo 2: RTD simulation with NEGF

09 Mar 2010 | Online Presentations | Contributor(s): Gerhard Klimeck

Demonstration of resonant tunneling diode (RTD) simulation using the RTD Simulation with NEGF Tool with a Hartree potential model showing potential profile, charge densities, current-voltage …

https://nanohub.org/resources/8317

Nanoelectronic Modeling: Exercises 1-3 - Barrier Structures, RTDs, and Quantum Dots

27 Jan 2010 | Online Presentations | Contributor(s): Gerhard Klimeck

Exercises: Barrier Structures Uses: Piece-Wise Constant Potential Barrier Tool Resonant Tunneling Diodes Uses: Resonant Tunneling Diode Simulation with NEGF • Hartree calculation • …

https://nanohub.org/resources/8259

Nanoelectronic Modeling: Multimillion Atom Simulations, Transport, and HPC Scaling to 23,000 Processors

07 Mar 2008 | Online Presentations | Contributor(s): Gerhard Klimeck

Future field effect transistors will be on the same length scales as “esoteric” devices such as quantum dots, nanowires, ultra-scaled quantum wells, and resonant tunneling diodes. In those …

https://nanohub.org/resources/3988

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

29 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 …

https://nanohub.org/resources/11043

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

29 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?

https://nanohub.org/resources/11051

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

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

Demonstration of the Piece-Wise Constant Potential Barriers Tool.

https://nanohub.org/resources/11052