2. nextnano++

nextnano++ is a Schrödinger-Poisson-current solver and simulates quantum wells, quantum wires, quantum dots, … nextnano++ (written in C++) is the successor of the nextnano³ code (written in Fortran).

nextnano++ features include:

• includes group IV materials (Si, Ge, SiGe) and all III-V materials, its ternaries and quaternaries;

• the nitrides are available in the zinc blende and wurtzite crystal structure

• flexible structures and geometries (1D, 2D and 3D)

• fully quantum mechanical electronic structure, based on the 8-band \(\mathbf{k} \cdot \mathbf{p}\) model

• strain, piezo and pyroelectric charges

• growth directions along [001], [011], [111], [211], … in short along any crystallographic direction

• equilibrium and nonequilibrium, calculation of current close to equilibrium (semi-classical)

• magnetic fields

This tool is documented in followin sections:

• 2.1. Overview
  • 2.1.1. Running
  • 2.1.2. Input file
  • 2.1.3. Output
  • 2.1.4. Examples
  • 2.1.5. Material database
• 2.2. Applications
  • 2.2.1. General
  • 2.2.2. Solar Cells
  • 2.2.3. Laser Diodes & LEDs
  • 2.2.4. Photodetectors
  • 2.2.5. QCLs
  • 2.2.6. Transistors
  • 2.2.7. Superlattices
  • 2.2.8. Quantum Wells
  • 2.2.9. Quantum Wires
  • 2.2.10. Quantum Dots
  • 2.2.11. 2DEGs
  • 2.2.12. Magnetic Field
  • 2.2.13. Nitrides
• 2.3. Models
  • 2.3.1. Introduction to strain calculation
  • 2.3.2. 1D - Piezoelectricity in wurtzite
  • 2.3.3. General scheme of the optical device analysis
• 2.4. Benchmarking
  • 2.4.1. Schrödinger Equation
  • 2.4.2. System of Schrödinger & Poisson Equations
  • 2.4.3. Optical Spectra using Fermi’s Golden Rule
• 2.5. Tutorials
  • 2.5.1. Basics
  • 2.5.2. Exercises
  • 2.5.3. Education
  • 2.5.4. Case Studies
  • 2.5.5. Numerics
  • 2.5.6. Tricks & Hacks
• 2.6. Reference
  • 2.6.1. Syntax definition
  • 2.6.2. Keywords
  • 2.6.3. Simulation output
  • 2.6.4. Material Database
  • 2.6.5. Command line arguments
  • 2.6.6. Settings for maximizing performance