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nextnano Documentation Logo
November 2023
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Getting Started

  • About the nextnano Software
  • Installation
    • First Steps
    • Operating system
      • Windows
      • Linux
        • Running nextnano++ & nextnano³ on Linux from Terminal
        • Running nextnano++ & nextnano³ on Linux using nextnanopy
        • License activation
        • nextnanomat on Linux
        • Wine Installation
      • MacOS
        • License activation
        • Option A: Run simulations from Terminal
        • Option B: Run simulations with nextnanopy
        • Option C: Run simulations with nextnanomat using Wine or Mono
    • Downloads
      • nextnano++ packages
        • Standard & Evaluation
        • Free
      • nextnano.NEGF
      • nextnanomat
      • Advanced downloads
        • nextnano++ & nextnano³ (Intel compiler)
        • nextnano.NEGF (C#)
        • nextnano License Activators
    • Release Notes
      • Release notes of nextnanomat
        • 2023-12-??
        • 2023-08-07
        • 2022-08-05
      • Release notes of nextnano++
        • 2023-12-??
        • 2023-08-07
        • 2023-05-12
        • 2023-02-20
        • 2022-12-20
        • 2022-08-05
        • 2022-06-09
      • Release notes of nextnano³
        • 2023-08-07
        • 2022-12-20
        • 2022-08-05
      • Release notes of nextnano.NEGF
        • 2023-05-25 (C++ version)
        • 2023-02-22 (first release of C++ version)
        • 2022-06-13
        • 2022-04-29
        • 2022-03-14
  • License Activation
    • License activation via command line
      • Online and offline activation
      • Fingerprint activation
    • License activation via nextnanomat
  • Digital Accessibility
    • Accessibility Statement for nextnano Software
      • Conformance status
      • Feedback
      • Compatibility with assistive technology
      • Limitations and alternatives
      • Assessment approach
    • Accessibility Evaluation Report for nextnano Software
      • Executive Summary
      • Scope of Review
      • Reviewers
      • Review Process
      • Results
        • Interpretative summary of review results
        • Detailed results
      • References

nextnano Tools

  • 1. nextnanomat
    • 1.1. GUI tabs
      • 1.1.1. Input
        • Autocomplete feature
      • 1.1.2. Template
        • Variable definition in input file (required)
        • Sweep over a variable + optional post-processing
        • Post-processing of existing sweep
      • 1.1.3. Template (Beta)
        • Introduction
        • The input file
        • How to create a sweep
        • Save input files and run a sweep
      • 1.1.4. Simulation
      • 1.1.5. Output
        • Navigation
        • Visualization
        • Features
        • Export functionality
        • Further information
    • 1.2. Settings
      • 1.2.1. Options: Simulation
      • 1.2.2. Options: Material database
      • 1.2.3. Options: Licenses
      • 1.2.4. Options: Editor
      • 1.2.5. Options: View/Output
      • 1.2.6. Options: Expert settings
      • 1.2.7. Options: Gnuplot settings
      • 1.2.8. Options: Custom executable
        • Example: How to run TiberCAD from nextnanomat
      • 1.2.9. Options: Data export
    • 1.3. Main menu functions
      • 1.3.1. Activate license
      • 1.3.2. Convert nextnano³ input file to nextnano++
      • 1.3.3. Clean Up Simulation Output Folder
      • 1.3.4. Generate nextnanopy Config File
      • 1.3.5. Generate System Snapshot for Troubleshooting
    • 1.4. Color maps
      • 1.4.1. Introduction
      • 1.4.2. Implementation
      • 1.4.3. References
    • 1.5. Export Functionalities
      • 1.5.1. Exporting to ParaView
        • Setting Up nextnanomat
        • Direct Export
        • Exporting 2D Outputs with Python Scripts
      • 1.5.2. Gnuplot export
        • How to export 1D plot files with Gnuplot
        • How to export 2D or 3D plot files with Gnuplot
        • How to optimze the looks of a Gnuplot graph
      • 1.5.3. Export via python scripts
        • How to call custom python scripts directly from nextnanomat
      • 1.5.4. Other
  • 2. nextnano++
    • 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. Models
      • 2.2.1. Hamiltonian: 8-band model for zincblende
        • The Model
        • Offsets
        • Deformation potentials
        • k.p parameters
      • 2.2.2. Introduction to strain calculation
        • Strain tensor \(\varepsilon\)
        • Stress tensor \(\sigma\)
        • Strain and stress calculation
      • 2.2.3. 1D - Piezoelectricity in wurtzite
        • Specify crystal orientation
        • Parameter sweep of the angle using Template: Sweep over the variable theta
        • Strain
        • Piezoelectric effect (first-order)
        • Post-Processing for polarization
        • Alloy content dependence
        • AlGaN
        • Piezoelectric effect (second-order)
      • 2.2.4. General scheme of the optical device analysis
        • Related tutorials
        • Determination of carrier densities and current densities
        • Optoelectronic characteristics based on the semi-classical model
        • Optoelectronic characteristics based on the quantum model
        • References
      • 2.2.5. Mobility
        • Low-field mobility models
        • High-Field Mobility Models
    • 2.3. Material Database
      • 2.3.1. Introduction to Material Database
        • Parameters of Elements & Binary Compounds
        • Bowing Parameters and Ternary Alloys
      • 2.3.2. Defining New Materials
        • Database or Input File?
        • Modifying an Existing Material
        • Defining a New Binary Compound or Element
        • Defining a New Alloy
      • 2.3.3. Interpolation Schemes
        • Introduction
        • Two-component alloys
        • Three-component alloys
        • Four-component alloys
        • Six-component alloys
        • Eight-component alloys
      • 2.3.4. Default Materials and Alloys
        • Insulators and Metals
        • Binary alloys
        • Ternary alloys
        • Quaternary alloys
        • Quinternary alloys
      • 2.3.5. Definition of Band Offsets (zincblende)
    • 2.4. Applications
    • 2.5. Tutorials
      • 2.5.1. Basics
        • Defining Structures
        • Contacts & Boundary Conditions
      • 2.5.2. Education
        • Orbitals of the Hydrogen Atom
        • Electron transport in n-type Silicon
        • Interpolation of 2-component alloys
        • Solution of the Poisson equation for different charge density profiles
        • Band gap of strained AlGaInP on GaAs substrate
        • 1D - p-n Junction
        • I-V Curves
        • GaN/AlN wurtzite structure: Strain, piezo and pyroelectric charges
      • 2.5.3. Solar Cells
        • 1D - Cascade solar cell (Tandem solar cell)
        • 1D - GaAs Solar Cell
      • 2.5.4. Light-Emitting Diodes
        • 1D - InGaAs Multi-quantum well laser diode
        • 1D - UV LED: Quantitative evaluation of the effectiveness of EBL
        • 1D - UV LED: Quantitative evaluation of the effectiveness of superlattice structure in p-region
      • 2.5.5. Quantum Wells
        • Parabolic Quantum Well (GaAs / AlAs)
        • 1D - Triangular well
        • 1D - InAs / GaSb broken gap quantum well (BGQW) (type-II band alignment)
        • 1D - Double Quantum Well
        • Si/SiGe MODQW (Modulation Doped Quantum Well)
        • 1D - Exciton Binding Energy in an Infinite Quantum Well
        • Scattering times for electrons in unbiased and biased single and multiple quantum wells
      • 2.5.6. Quantum Wires
        • 2D - Hexagonal GaAs/AlGaAs nanowires
        • 2D - Electron wave functions in a cylindrical well (2D Quantum Corral)
      • 2.5.7. Quantum Dots
        • Energy levels in idealistic 3D cubic and cuboidal shaped quantum dots
        • Hole energy levels of an “artificial atom” - Spherical Si Quantum Dot (6-band k.p)
        • 3D - Quantum Dot Molecule
        • Energy levels in a pyramidal shaped InAs/GaAs quantum dot including strain and piezoelectric fields
        • 3D - Hexagonal shaped GaN quantum dot embedded in AlN (wurtzite)
        • 3D - Artificial quantum dot crystal - Superlattice dispersion (minibands)
        • 3D - Energy levels of an “artificial atom” - Spherical and ellipsoidal CdSe Quantum Dot
      • 2.5.8. Electronic Band Structures
        • k.p dispersion in bulk GaAs (strained / unstrained)
        • k.p dispersion in bulk unstrained, compressively and tensely strained GaN (wurtzite)
        • k.p dispersion in bulk unstrained ZnS, CdS, CdSe and ZnO (wurtzite)
        • Energy dispersion of holes in a quantum well
        • k.p dispersion of an unstrained GaN QW embedded between strained AlGaN layers
        • Energy dispersion of a cylindrical shaped GaN nanowire
        • Energy dispersion in Silicon inversion layers
      • 2.5.9. Superlattices
        • Dispersion in infinite superlattices: Minibands (Kronig-Penney model)
        • 1D - InAs / In0.4Ga0.6Sb superlattice dispersion with 8-band k.p (type-II band alignment)
        • 1D - Multiple quantum wells and finite superlattices
      • 2.5.10. Cascade Structures
        • 1D - Simple quantum cascade structure
        • 1D - Quantum-Cascade Lasers
      • 2.5.11. Optical Spectra and Transitions
        • Single Electron
        • Excitons
      • 2.5.12. 2DEGs & Conductance
        • 1D - Schrödinger-Poisson - A comparison to the tutorial file of Greg Snider’s code
        • 1D - Transmission (CBR)
        • 1D, 2D - Landauer conductance and conductance quantization: from quantum wires to quantum point contacts
        • 2D - Electron Flying Qubit
        • 3D - Depletion of electrons in a two-dimensional electron gas (2DEG)
        • 3D - Conductance of a quantum point contact (gated two-dimensional electron gas)
        • 3D - Transmission through a nanowire (CBR)
      • 2.5.13. Transistors
        • HEMT structure (High Electron Mobility Transistor)
        • Two-dimensional electron gas in an AlGaN/GaN field effect transistor
        • 2D - MOS Capacitor & MOSFET
        • 2D - Electron wave functions of a 2D slice of a Triple Gate MOSFET
        • Single-electron transistor - laterally defined quantum dot
      • 2.5.14. Magnetic Effects
        • 2D - Fock-Darwin states of a parabolic, anisotropic (elliptical) potential in a magnetic field
        • 2D - Fock-Darwin states of parabolic, isotropic potential in a magnetic field
        • 2D - Landau levels of a bulk GaAs sample in a magnetic field
      • 2.5.15. Numerics
        • General
        • Big 3D systems
      • 2.5.16. Tricks & Hacks
        • 1D - C-V curve calculation for general structures (Post-processing by python)
        • 1D - Interband tunneling current in a highly-doped nitride heterojunction
        • 1D - Optical generation in InGaAs/GaAs QW
        • 1D - Photoluminescence of Quantum Well
        • 3D - From GDSII to Transmission Workflow
    • 2.6. Keywords
      • 2.6.1. classical{}
        • Bands and Statistics
        • Bulk Electronic Band Structure
        • More Output Files
      • 2.6.2. contacts{}
        • What are contacts in nextnano++
        • Attributes
        • Available boundary conditions
        • Summary and Additional Remarks
        • Examples
      • 2.6.3. currents{} (optional)
        • Initialization and Debugging
        • Mobility
        • Recombination
        • Solver
        • Numerical Control
        • Outputs
      • 2.6.4. database{} (optional)
        • Top level keywords in database{}
        • Nested groups in database{ …_zb{} } and database{ …_wz{} }
      • 2.6.5. global{}
        • simulate1D{} / simulate2D{} / simulate3D{}
        • crystal_zb{} / crystal_wz{}
        • substrate{}
        • temperature
        • temperature_dependent_bandgap
        • temperature_dependent_lattice
        • periodic{}
        • magnetic_field{}
      • 2.6.6. grid{}
        • xgrid{} / ygrid{} / zgrid{}
      • 2.6.7. import{} (optional)
      • 2.6.8. impurities{} (optional)
        • donor{ } / acceptor{ }
        • charge{ }
        • Example:
        • Activation Energies
      • 2.6.9. optics{} (optional)
        • optics{ emission_spectrum{} }
        • optics{ irradiation{} }
        • optics{ quantum_region{} }
      • 2.6.10. output{} (optional)
        • Visualization
        • VTK format for rectilinear grid
        • AVS format for rectilinear grid
        • Output of material parameters
      • 2.6.11. poisson{} (optional)
        • Initial electrostatic potential in poisson{}
        • Solvers in poisson{}
        • Outputs in poisson{}
      • 2.6.12. quantum{} (optional)
        • quantum{ region{} }
        • quantum{ exchange_correlation{} }
        • quantum{ cbr{} } (optional)
        • quantum{ debuglevel }
        • quantum{ allow_overlapping_regions }
      • 2.6.13. run{}
        • General
        • Semi-Classical Run
        • Quantum Run
        • Examples
        • Restrictions
        • Further remarks
      • 2.6.14. strain{} (optional)
        • Specifying the strain model
        • Piezo- and pyroelectric charges
        • Specify growth direction (for pseudomorphic strain model)
        • Solver definitions
        • Debugging
        • Output definitions
        • Output of material parameters
      • 2.6.15. structure{}
        • structure{ region{} } - shape objects
        • structure{ region{} } - assigning materials
        • structure{ region{} } - boundary conditions
        • structure{ region{} } - doping
        • structure{ region{} } - generation & electron injection
        • structure{ region{} } - Repeating regions
        • structure{ region{} } - integration
        • structure{} - outputs
      • 2.6.16. postprocessor{} (optional)
    • 2.7. Input Syntax
      • 2.7.1. General
        • Case Sensitivity
        • White-Spaces
        • Semicolons
      • 2.7.2. Variables
        • Numbers and arrays
        • Strings
      • 2.7.3. Comments
        • One-line comment
        • Multi-line comment
      • 2.7.4. Conditional Statements
        • Conditional lines
        • Conditional blocks
      • 2.7.5. Data section
      • 2.7.6. Operators and functions
        • Tables for number variables
        • Arithmetic comparisons and logical operators
        • Dealing with floating-point numbers
        • Functions for array variables
      • 2.7.7. Debug statements
      • 2.7.8. Groups and attributes
      • 2.7.9. XML Tags
      • 2.7.10. Additional Examples and Remarks
    • 2.8. Simulation Output
      • 2.8.1. Error handling with log file
    • 2.9. Command Line
    • 2.10. Maximizing Performance
  • 3. nextnano³
    • 3.1. Overview
    • 3.2. Input Syntax
      • 3.2.1. Macro features
        • Macro 1: Variables
        • Macro 2: Namelist (deprecated)
      • 3.2.2. The input file keywords
      • 3.2.3. Keywords
        • $simulation-dimension
        • $regions
        • $region-cluster
        • $quantum-cluster
        • $current-cluster
        • $current-regions
        • $current-models
        • $impurity-parameters
        • $material-interfaces
        • $magnetic-field
        • $Auger-recombination
        • $direct-recombination
        • $SRH-recombination
        • $mobility-model-constant
        • $mobility-model-minimos
        • $mobility-model-simba
        • $mobility-model-arora
        • $mobility-model-dar
        • $mobility-model-lom
        • $mobility-model-masetti
        • $optical-absorption
        • $buffer-solutions
        • $buffer-constant-A(T)
        • $tighten
        • $tight-binding
        • $warnings
        • $quantum-bound-states
        • $quantumstate-recombination-rates
        • $NEGF-spintronics
        • $global-parameters
        • $output-grid
        • $output-geometry
        • $output-raw-data
        • $input-filename
        • $Monte-Carlo
        • $domain-coordinates
        • $material
        • $strain-minimization-model
        • $poisson-boundary-conditions
        • $quantum-dot-layer-density
        • $output-strain
        • $output-bandstructure
        • $output-1-band-schroedinger
        • $output-kp-data
        • $output-densities
        • $output-current-data
        • $output-file-format
        • $output-section
        • $output-material
        • $doping-function
        • $interface-states
        • $global-settings
        • $simulation-flow-control
        • $grid-specification
        • $import-data-on-material-grid
        • $binary-zb-default
        • $binary-wz-default
        • $ternary-zb-default
        • $ternary-wz-default
        • $alloy-function
        • $numeric-control
        • $CBR-current
        • $quantum-regions
        • $quantum-model-electrons
        • $quantum-model-holes
        • $voltage-sweep
        • $electric-field
        • $simple-drift-models
        • $NEGF
        • $electrolyte
        • $electrolyte-ion-content
    • 3.3. Material Database
      • 3.3.1. The database keywords
      • 3.3.2. Keywords
        • $binary-zb-default
        • $binary-wz-default
        • $ternary-zb-default
        • $ternary-wz-default
        • $default-materials
        • $default-material-models
        • $Auger-recombination
        • $direct-recombination
        • $SRH-recombination
        • $mobility-model-arora
        • $mobility-model-constant
        • $mobility-model-dar
        • $mobility-model-lom
        • $mobility-model-masetti
        • $mobility-model-minimos
        • $mobility-model-simba
        • $mobility-models
        • $transport-models
        • $buffer-constant-A(T)
        • $buffer-solutions
        • $physical-constants
        • $input-scaling-factors
        • $global-parameters
        • $program_restrictions
        • $input_filename
        • $domain-coordinates-defaults
        • $zb-default-expectations
        • $wz-default-expectations
        • $zb-restrictions
        • $wz-restrictions
        • $region-default
        • $known-doping-functions
        • $known-function-names
        • $known-impurity-types
        • $interface-state-limitations
        • $quantum-model-electrons
        • $quantum-model-holes
        • $separation-models-electrons
        • $separation-models-holes
        • $method-of-brillouin-zone-integration
        • $k-range-determination-methods
        • $tight-binding-parameters
        • $warnings
    • 3.4. Tutorials
      • 3.4.1. Heterostructures
        • Quantum Confined Stark Effect (QCSE)
        • Optical interband absorption in a quantum well including excitonic effects
        • Schottky barrier
      • 3.4.2. Band structure
        • Empirical tight-binding sp3s* band structure of GaAs, GaP, AlAs, InAs, C (diamond) and Si
        • Tight-binding band structure of graphene
        • 30-band \(\mathbf{k}\cdot\mathbf{p}\) band structure calculation
      • 3.4.3. Transmission
        • Efficient method for the calculation of ballistic quantum transport - The CBR method (2D example)
        • Transmission through a 3D nanowire (3D example)
        • 1D - Quantum Tunneling: Comparison of CBR- and WKB approaches with the exact answer
        • 1D - Quantum Tunneling and Fowler-Nordheim theory
      • 3.4.4. Electrolyte
        • Poisson–Boltzmann equation: The Gouy–Chapman solution
        • Charge accumulation at the diamond–electrolyte interface
      • 3.4.5. Quantum Mechanics
      • 3.4.6. Semiconductor Physics
      • 3.4.7. Strain and Piezoelectricity
      • 3.4.8. Magnetic field
      • 3.4.9. Heterostructures
      • 3.4.10. k.p
      • 3.4.11. T2SL
      • 3.4.12. 2DEGs
        • Mobility in two-dimensional electron gases (2DEGs)
      • 3.4.13. Optoelectronics
      • 3.4.14. Electronics
      • 3.4.15. NEGF
      • 3.4.16. Electrolyte
      • 3.4.17. Graphene
      • 3.4.18. Hello World
    • 3.5. Command Line
  • 4. nextnano.NEGF
    • 4.1. Overview
    • 4.2. Input Syntax
    • 4.3. Material Database
    • 4.4. Tutorials
      • 4.4.1. THz QCLs
        • GaAs/AlGaAs
        • InGaAs/AlGaSb
      • 4.4.2. Mid-IR QCLs
        • InGaAs/AlInAs
        • GaAs/AlGaAs
      • 4.4.3. AlGaAs/GaAs RTD
        • Simulation input
        • Simulation output
    • 4.5. Command Line
  • 5. nextnano.MSB
    • 5.1. Overview
    • 5.2. Command line arguments
    • 5.3. Input file syntax
      • 5.3.1. Input file
      • 5.3.2. General syntax
    • 5.4. Material database
      • 5.4.1. Elements and binary compounds
        • ConductionBandOffset
        • ValenceBandOffset
        • BandGap
        • BandGapAlpha
        • BandGapBeta
        • ElectronMass
        • EpsStatic
        • EpsOptic
        • LOPhononEnergy
        • LOPhononWidth
        • DeformationPotential
        • MaterialDensity
        • VelocityOfSound
        • AcousticPhononEnergy
        • Lattice_a
        • Elastic_c11
        • Elastic_c12
        • Elastic_c44
        • Piezo_e14
      • 5.4.2. Ternary compounds
      • 5.4.3. Quaternary compounds
    • 5.5. Simulation output
      • 5.5.1. Input
        • Material parameters
        • Input parameters
      • 5.5.2. Output
        • Energy profile
        • Eigenstates
        • CarrierDensity
        • DOS
        • Probes
        • Gain
        • Gain-voltage characteristics
        • Transmission
        • Current density
        • Current-voltage characteristics (I-V curve)
    • 5.6. Log file
    • 5.7. Tutorials
      • 5.7.1. Transmission coefficient of a double barrier structure
      • 5.7.2. Ballistic current calculation of a GaAs nin resistor
        • Example 1
        • Example 2
      • 5.7.3. Resonant tunneling diode (RTD)
      • 5.7.4. Quantum Well
      • 5.7.5. AlGaAs/GaAs THz QCL
  • 6. nextnanopy
    • 6.1. Overview
      • 6.1.1. What is nextnanopy?
      • 6.1.2. How do I install it?
      • 6.1.3. Where to start?
    • 6.2. Tutorials
      • 6.2.1. Basic Tutorials
      • 6.2.2. Data Visualization
  • 7. nextnanoevo
    • 7.1. Overview
      • 7.1.1. About
      • 7.1.2. Purpose
      • 7.1.3. Requirements
    • 7.2. Tutorials
      • 7.2.1. Maximizing Envelope Overlaps for a Given Transition Energy
        • Header
        • Introduction
        • How to run the optimization
        • Optimizing type-II superlattice
        • Conclusion

Cloud Computing

  • HTCondor
    • HTCondor on nextnanomat
    • Recommended Installation Process
      • Summary of settings (Example)
      • Config file
      • Configuring a pool without a domain
    • Submitting jobs to HTCondor pool with nextnanomat
    • Useful HTCondor commands for the Command Prompt
    • HTCondor Pool - Managing Slots
      • Dynamic slots
    • Machine states
    • Machine activities
    • Configuration options for the Central Manager computer
    • FAQ
    • Problems with HTCondor
      • Error: communication error
      • Error: condor_store_cred add failed with Operation failed. Make sure your ALLOW_WRITE setting include this host.
      • Error? Check the Log files
    • Known bugs
    • Run your custom executable on HTCondor with nextnanomat
      • Input file identifier
      • Settings for Hello World (HW)
      • Settings for Quantum ESPRESSO (QE)
      • Settings for ABINIT
        • Notes

Support

  • Frequently Asked Questions (FAQ)
    • FAQ - General
      • Copyright Statement
      • Are there any video tutorials available?
      • Hardware requirements for nextnano? I want to buy a new computer. What shall I buy?
      • How shall I cite the nextnano software in publications?
    • FAQ - Simulation
      • nextnano Product related
        • Which features have been implemented recently?
        • What is the difference between nextnano³ and nextnano++?
        • Can I convert nextnano³ input files into nextnano++ input files?
        • How can I track how much memory is used during the simulations?
        • Can I pass additional command line arguments to the executable?
        • How can I speed up my calculations with respect to CPU time?
        • Can I take advantage of parallelization of the nextnano software on multi-core CPUs?
        • Dirichlet vs. Neumann boundary conditions
        • Quasi-Fermi level
        • I don’t understand the \(\mathbf{k} \cdot \mathbf{p}\) parameters
        • Can I add new materials to the database?
      • GUI nextnanomat related
        • How do I produce 1D slices through the 2D plots in the GUI?
        • Is there a way to produce a 1D (or 2D) plot of some result, for example the probability density with the conduction band edge superimposed?
        • In other words, can the GUI show multiple plots at once?
        • What is the difference between “List view” and “Tree view”?
    • FAQ - Licensing
      • Which types of licenses exist?
      • How many people can use the software simultaneously?
      • Which license do I need for Cluster computing?
      • Is there a possibility to evaluate the nextnano software before purchasing?
      • I remember there have been .txt licenses before, what happened to them?
      • License activation
        • I don’t have a license (key)
        • I already purchased a license
        • Can I activate my license without using nextnanomat?
        • I encounter an error during license activation
      • Licensing.dll cannot be found
      • License could not be verified
    • FAQ - Error messages and handling
      • Where to find simulation LOG file
      • How to add additional debug information to the LOG file
      • ERROR when loading input file “File format is not valid”
      • Error while starting simulation (“The specified executable is not a valid application for this OS platform.”)
      • No Dirichlet points for Fermi levels found
      • Quantum-Current-Poisson fails to converge
      • Which files should I attach to a support request?
  • Error handling
    • nextnano simulation does not start
      • Possible error sources
      • Files to be included in support request
    • nextnano simulation does not finish (errors in log file)
    • Application nextnanomat cannot be started
    • nextnanomat prompts error or exception message
    • Further References
  • Support Ticket System
    • Motivation
    • How to get the fastest support possible?
    • Channels
      • Help Center (recommended)
      • Widget
      • Email

References

  • Books
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Error handling¶

Please select the source of the error and proceed according to the instructions.

  • nextnano simulation does not start
  • nextnano simulation does not finish (errors in log file)
  • Application nextnanomat cannot be started
  • nextnanomat prompts error or exception message

Further References¶

  • Options: Simulation

  • Options: Licenses

  • Options: View/Output

  • Options: Material database

  • Where to find simulation LOG file

  • How to add additional debug information to the LOG file

  • Generate System Snapshot for Troubleshooting

  • FAQ - Error messages and handling

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