ECE 656 Lecture 34: Ensemble Effectsin Non-Local Transport

07 Dec 2009 | Online Presentations | Contributor(s): Mark Lundstrom

Outline: Review of velocity overshoot Steady-state, spatial transients Heterojunction launching ramps Repeated velocity overshoot Questions?

http://nanohub.org/resources/7960

ECE 656 Lecture 32: High-Field Transport

01 Dec 2009 | Online Presentations | Contributor(s): Mark Lundstrom

Outline: Brief Introduction Current Equation Qualitative features of high field transport Saturated velocity Electron temperature model Survey of results Quick Summary

http://nanohub.org/resources/7887

ECE 656 Lecture 31: Monte Carlo Simulation

01 Dec 2009 | Online Presentations | Contributor(s): Mark Lundstrom

Outline: Introduction Review of carrier scattering Simulating carrier trajectories Free flight Collision Update after collision Putting it all together Summary

http://nanohub.org/resources/7886

ECE 656 Lecture 30: Balance Equation Approach III

01 Dec 2009 | Online Presentations | Contributor(s): Mark Lundstrom

Outline Carrier Temperature and Heat Flux Balance equations in 3D Heterostructures Summary

http://nanohub.org/resources/7885

ECE 656 Lecture 33: Non-Local Transport

25 Nov 2009 | Online Presentations | Contributor(s): Mark Lundstrom

Outline: Review of high-field transport MC simulation of high-field transport Velocity overshoot Summary

http://nanohub.org/resources/7888

ECE 656 Lecture 29: Balance Equation Approach II

24 Nov 2009 | Online Presentations | Contributor(s): Mark Lundstrom

Outline: Quick review Energy balance equation Energy flux balance equation Terminating the hierarchy Summary

http://nanohub.org/resources/7883

ECE 656 Lecture 28: Balance Equation Approach I

13 Nov 2009 | Online Presentations | Contributor(s): Mark Lundstrom

Outline: Introduction General continuity equation Carrier continuity equation Current equation Summary

http://nanohub.org/resources/7833

ECE 656 Lecture 27: Scattering of Bloch Electrons

13 Nov 2009 | Online Presentations | Contributor(s): Mark Lundstrom

Outline: Umklapp processes Overlap integrals ADP Scattering in graphene

http://nanohub.org/resources/7827

ECE 656 Lecture 26: Mobility in 3D, 2D, and 1D

13 Nov 2009 | Online Presentations | Contributor(s): Mark Lundstrom

The goal in this lecture is to examine one scattering mechanism (ADP scattering) in 3D, 2D, and 1D to see how the scattering rate changes with dimensionality. Then we’ll compare mobilities …

http://nanohub.org/resources/7820

ECE 656 Lecture 25: Phonon Scattering III

13 Nov 2009 | Online Presentations | Contributor(s): Mark Lundstrom

Outline: Review POP and IV scattering Scattering in common semiconductors Electron-electron scattering Summary

http://nanohub.org/resources/7813

ECE 656 Lecture 24: Phonon Scattering II

13 Nov 2009 | Online Presentations | Contributor(s): Mark Lundstrom

Outline: Review Energy-momentum conservation Mathematical formulation Example Summary

http://nanohub.org/resources/7806

ECE 656 Lecture 23: Phonon Scattering I

10 Nov 2009 | Online Presentations | Contributor(s): Mark Lundstrom

Outline: About phonons Electron-phonon coupling Energy-momentum conservation Summary

http://nanohub.org/resources/7780

ECE 656 Lecture 16: Solving the BTE: Magnetic Fields

09 Nov 2009 | Online Presentations | Contributor(s): Mark Lundstrom

Outline: General solution Current equation Coupled current equations Example Summary

http://nanohub.org/resources/7508

ECE 656 Lecture 22: Charged Impurity Scattering

06 Nov 2009 | Online Presentations | Contributor(s): Mark Lundstrom

Online: Review Screening Brooks-Herring approach Conwell-Weisskopf approach Discussion Summary / Questions

http://nanohub.org/resources/7764

ECE 656 Lecture 18: Strong Magnetic Fields

05 Nov 2009 | Online Presentations | Contributor(s): Mark Lundstrom

Outline Magnetoconductivity tensor Resistivity tensor Strong B-fields: Landau levels Shubnikov-DeHaas Oscillations and QHE Summary

http://nanohub.org/resources/7693

ECE 656 Lecture 19: Characteristic Times

05 Nov 2009 | Online Presentations | Contributor(s): Mark Lundstrom

Outline: Characteristic times Relaxation Time Approximation and τr

http://nanohub.org/resources/7741

ECE 656 Lecture 20: Transmission and Backscattering

05 Nov 2009 | Online Presentations | Contributor(s): Mark Lundstrom

Outline: Transmission and mfp MFP and carrrier scattering Extracting mean-free-paths from experiments

http://nanohub.org/resources/7748

ECE 656 Lecture 21: Scattering and Fermi's Golden Rule

05 Nov 2009 | Online Presentations | Contributor(s): Mark Lundstrom

Outline: Fermi’s Golden Rule Example: static potential Example: oscillating potential Discussion Summary

http://nanohub.org/resources/7755

ECE 656 Lecture 14: Solving the BTE: 1D/RTA

07 Oct 2009 | Online Presentations | Contributor(s): Mark Lundstrom

Outline: The RTA Solving the BTE: drift Solving the BTE: diffusion Energy-dependent scattering time Relation to Landauer Discussion Summary

http://nanohub.org/resources/7506

ECE 656 Lecture 11: Discussion

07 Oct 2009 | Online Presentations | Contributor(s): Mark Lundstrom

Outline: P-type conductors and thermoelectrics ZT figure of merit Maximizing the “power factor” TE parameters for non-degenerate semiconductor

http://nanohub.org/resources/7395