Outline

8/31/98


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Table of Contents

PPT Slide

Outline

NEMO Genealogy

Summary of NEMO Capabilities

All of NEMO's Facets:?Formalism, Physics, and Technology

PPT Slide

First Simulation Results:?Structural Analysis

First Simulation Results:?Structural Analysis

Future Interest

Outline

Transport via Transmission Coefficients

Full Band Simulation of?RTD Electron Transport

Mechanics of?2D Integration

Mechanics of?2D Integration

Full Band Simulation of Electron Transport

Resonance Coupling vs. ?Transverse Momentum

Quantum Well and Notch Subbands

Spurious Bistability

Effect of Exchange and Correlation Potential

Outline

Hole Transport in a AlAs/GaAs/AlAs RTD

GaAs Bulk HH and LH Bandstructure

Hole Resonance States in GaAs/AlAs RTD

Hole Transport in a GaAs/AlAs RTD

Excited HH-States Move up in Energy

LH-States Move down in Energy

Transverse Hole Subbands?in GaAs/AlAs RTD

Cave Canem!?Beware of the Wolf!

Narrow GaAs Well

Hole Transport

Current Integral Varies Qualitatively with Different Transverse Momenta

Current Density J(k)

Current Voltage Characteristic

Outline

Comparison of GaAs?sp3s* and k.p bulk bandstructure

Comparison of GaAs?sp3s* and k.p bulk bandstructure

Comparison of GaAs?sp3s* and k.p bulk bandstructure

Sp3s* vs. k.p:?Transverse Subbands in 30ml ?Al0.3Ga0.7As/GaAs/Al0.3Ga0.7As Quantum Well

Comparison of InAs?sp3s* and k.p bulk bandstructure

Comparison of InAs?sp3s* and k.p bulk bandstructure

Comparison of InAs?sp3s* and k.p bulk bandstructure

Open list for pros and cons:?tight binding vs. k.p

Conclusions

Author: Gerhard KLimeck

Email: gekco@jpl.nasa.gov

Home Page: http://www-hpc.jpl.nasa.gov/PEP/gekco