﻿ tutorials | nextnano

# Tutorials

## Tutorials

On this website, you can download a selection of our tutorial input files, namely

## Double quantum well

What you can learn:
• Energy levels and wave functions of a double quantum well as a function of quantum well separation (barrier width)
• Schrödinger equation
• Template feature of nextnanomat

Input files for: 1D / nextnano++, nextnano³ / Date: 2018-06-25

## Triangular quantum well

What you can learn:
• Energy levels and wave functions of a triangular quantum well
• Schrödinger equation

Input files for: 1D / nextnano++, nextnano³ / Date: 2016-09-22

## Quantum well (Interband transitions)

What you can learn:
• Energy levels and wave functions of an infinite and finite quantum well, interband transition matrix elements (spatial wave function overlap), selection rules
• Schrödinger equation

Input files for: 1D / nextnano++, nextnano³ / Date: 2018-06-25

## Schottky barrier

What you can learn:
• Metal-semiconductor interface: Fermi-level pinning; Ohmic contact vs. Schottky contact vs. Surface charge density vs. Surface doping
• Poisson equation

Input files for: 1D, 2D / nextnano++, nextnano³ / Date: 2016-07-20

## pn junction

Example 1: GaAs pn junction (forward bias)

What you can learn:
• doping
• Poisson equation
• apply a bias, drift-diffusion calculation, recombination
• Current-Poisson equation

Input files for: 1D, 2D, 3D / nextnano++, nextnano³ / Date: 2019-05-09

What you can learn:
• pn junction, heterostructure, doping
• strain equation, Poisson equation

Input files for: 1D / nextnano++, nextnano³ / Date: 2016-07-20

## Schrödinger-Poisson

What you can learn:
• heterostructure, doping, 2DEG, AlGaAs/GaAs, user-defined function for the doping profile
• self-consistent Schrödinger-Poisson equation

Input files for: 1D, 2D / nextnano³ / Date: 2017-05-30

## HEMT

InGaAs/AlInAs HEMT structure (High Electron Mobility Transistor)

What you can learn:
• heterostructure, doping, 2DEG, InGaAs/AlInAs
• strain equation, self-consistent Schrödinger-Poisson equation

Input files for: 1D, 2D, 3D / nextnano++, nextnano³ / Date: 2016-07-20

## Inverted HEMT

AlGaAs/GaAs inverted HEMT structure (High Electron Mobility Transistor) - no online documentation available

What you can learn:
• heterostructure, doping, 2DEG, AlGaAs/GaAs, variables in input file
• self-consistent Schrödinger-Poisson equation

Input files for: 1D / nextnano³ / Date: 2016-07-20

## Si/SiGe MODQW

Si/SiGe MODQW (Modulation Doped Quantum Well)

What you can learn:
• heterostructure, doping, 2DEG, Si/SiGe, strain, Delta band edge
• strain equation, self-consistent Schrödinger-Poisson equation

Input files for: 1D / nextnano++, nextnano³ / Date: 2016-07-20

## AlGaInP on GaAs

What you can learn:
• alloys, linearly graded alloys, bowing, strain, band gaps
• strain equation

Input files for: 1D / nextnano++ / nextnano³ / Date: 2016-10-25

## Capacitance-Voltage (MIS)

What you can learn:
• apply a bias
• self-consistent Schrödinger-Poisson equation

Input files for: 1D / nextnano++, nextnano³ / Date: 2017-07-03

## Wurtzite

What you can learn:
• wurtzite, strain, piezoelectricity, pyroelectricity
• strain equation, Poisson equation

Input files for: 1D / nextnano++, nextnano³ / Date: 2018-10-17

## AlGaN/GaN FET

- Two-dimensional electron gas in an AlGaN/GaN field effect transistor (FET)
(nextnano++ tutorial)
- Two-dimensional electron gas in an AlGaN/GaN field effect transistor (FET)
(nextnano³ tutorial)

What you can learn:
• wurtzite, strain, piezoelectricity, pyroelectricity, electron energy levels and wave functions, 2DEG, variables in input file
• strain equation, self-consistent Schrödinger-Poisson equation

Input files for: 1D, 2D / nextnano++, nextnano³ / Date: 2019-04-18

## InGaAs multiple quantum well

What you can learn:
• single-band effective mass vs. 8-band k·p, InGaAs/AlInAs
• self-consistent Schrödinger-Poisson equation, 8-band k·p Schrödinger equation

Input files for: 1D / nextnano++, nextnano³ / Date: 2018-09-18

## Core-shell nanowires

What you can learn:
• 2D simulations, circular and hexagonal quantum confinement, core-shell nanowires, sweep over alloy concentrations and core radius, interband transitions (spatial overlap matrix elements)
• Schrödinger equation in 2D, self-consistent Schrödinger-Poisson equation in 2D

Input files for: 2D / nextnano++, nextnano³ / Date: 2016-07-20

## Quantum dot molecule

What you can learn:
• 3D simulation, quantum dot, applying an electric field, performing an electric field sweep
• Schrödinger equation in 3D

Input files for: 3D / nextnano++, nextnano³ / Date: 2016-07-20

## Quantum dot (pyramid)

What you can learn:
• 3D simulation, quantum dot, strain, piezoelectric fields
• Strain equation, Poisson equation, Schrödinger equation in 3D

Input files for: 3D / nextnano++, nextnano³ / Date: 2016-07-20

## Spherical Si Quantum Dot (Artificial Atom)

What you can learn:
• 3D simulation, quantum dot, spin-orbit splitting, artificial atom
• 6-band k.p Schrödinger equation in 3D

Input files for: 3D / nextnano++, nextnano³ / Date: 2017-01-27

## Laser Diode (InGaAs)

InGaAs Laser Diode - no online documentation available

What you can learn:
• drift-diffusion current based on quantum density, pn junction, quaternaries
• self-consistent Schrödinger-Poisson-Current equation in 1D

Input files for: 1D / nextnano++ / Date: 2017-07-03

## Ultrathin-body Double Gate FET - DG MOSFET (Double Gate Metal Oxide Semiconductor Field Effect Transistor)

Double Gate MOSFET (Metal Oxide Semiconductor Field Effect Transistor)

What you can learn:
• 2D and 3D simulations, drift-diffusion, mobility models
• self-consistent Current-Poisson equation in 2D and 3D

Input files for: 2D / nextnano++, nextnano³ / Date: 2019-03-08

## Strained substrate

What you can learn:
• uniaxial and biaxial strain, stress
• strain equation

Input files for: 1D / nextnano³ / Date: 2016-07-20

## Dispersion in infinite superlattices: Minibands (Kronig-Penney model)

What you can learn:
• Schrödinger equation in 1D with periodic boundary conditions
• superlattice dispersion
• band structure of an artificial crystal (quantum well crystal)

Input files for: 1D / nextnano++, nextnano³ / Date: 2017-11-30

## Broken gap quantum well

InAs / GaSb broken gap quantum well (BGQW) (type-II band alignment)

What you can learn:
• 1D simulation, 8-band k·p, broken gap, type-II band alignment
• 8-band k·p equation

Input files for: 1D / nextnano++, nextnano³ / Date: 2019-11-21

## Optical absorption

Optical absorption of a quantum well - Diploma thesis documentation available

What you can learn:
• 8-band k·p, optical absorption
• 8-band k·p equation

Input files for: 1D / nextnano++ / Date: 2019-03-08

## Tight-binding (sp3s*)

What you can learn:
• tight-binding band structure of bulk semiconductors

Input files for: nextnano³ / Date: 2019-02-27

(for 2015-08-18 version of nextnano)