News

• 26-01-2012
  Schrödinger equation of a two-dimensional core-shell structure
  Hexagonal 2DEG - Two-dimensional electron gas in a delta-doped hexagonal shaped GaAs/AlGaAs nanowire heterostructure
• 09-06-2011
  - New update of the code released: Download
• 07-06-2011
  - Density in np-doped GaAs superlattice - Comparison of classical, quantum, k.p and full-band density k.p approach for normal and broken gap alignment
• 24-05-2011
  - Density in n-doped GaAs - Comparison of classical, quantum, k.p and full-band density k.p approach
• 09-03-2010
  - New feature: alloy sweep (sweep over alloy concentration) $alloy-function
• 25-01-2010
  - Extended Poisson-Boltzmann equation: Potentials of mean force (PMF)
• 28-10-2009
  - Carrier statistics of graphene sheets
• 22-10-2009
  - Transmission through a 3D nanowire
• 10-09-2009
  - Intermediate-band solar cell (artificial quantum dot crystal)
• 21-08-2009
  - Strain effects in freestanding three-dimensional nitride nanostructures
• 23-04-2009
  - 2D: Efficient method for the calculation of ballistic quantum transport - The CBR method (2D example)
• 06-08-2008
  - 3D: Artificial quantum dot crystal - Superlattice dispersion (minibands)
• 24-07-2008
  - 1D: k.p dispersion in bulk unstrained ZnS, CdS and CdSe (wurtzite)
• 17-05-2008
  - 1D: Piezoelectric field in InAs/GaAs QWs grown along the [111] orientation
• 28-04-2008
  - 1D: Transmission function - NEGF
• 16-04-2008
  - 3D: Artificial atom - Si QD with 6x6 k.p
• 16-04-2008
  - 3D: Single-electron transistor
• 20-03-2008
  - 3D/2D: Artificial atom
  - 2D: Fock-Darwin states of a 2D parabolic, anisotropic (elliptical) potential in a magnetic field
• 03-10-2007
  - Tight-binding band structure of graphene
• 26-Sep-2007
  - 1D: Capacitance-Voltage (C-V) curve of a "metal"-insulator-semiconductor (MIS) structure
• 14-Sep-2007
  - 1D: Growth of layers on strained (or stressed) substrates (biaxial and uniaxial)
• 30-Aug-2007
  - 1D: Strained AlAs QW - Crossover of ground states
• 22-Aug-2007
  - 1D: Self-consistent 6x6 k.p calculations of holes in strained Si/SiGe MOSFETs
• 21-Aug-2007
  - 1D: Mobility in two-dimensional electron gases (2DEGs) - InSb, GaAs and InGaAs quantum wells
• 31-Jul-2007
  - 1D: Cascade solar cell (AlGaAs/InGaAs tandem solar cell)
• 30-Jul-2007
  - 1D: Electron density of states (DOS) of a GaAs quantum well and
    1D: hole density of states (DOS) of a Si hole channel
• 13-Jul-2007
  - Tight-binding band structure of bulk materials (Empirical tight-binding (sp³s*) band structure of GaAs, GaP and AlAs)
• 06-Apr-2007
  - 1D/2D: Vertically coupled quantum wires in a longitudinal magnetic field
• 30-Mar-2007
  - 1D: Optical interband transitions in a quantum well - Matrix elements and selection rules
  - 2D: Exciton correction in quantum wires
• 09-Feb-2007
  - 3D: QD molecule
• 12-Jan-2007
  - 1D: Poisson equation (for different charge density profiles)
  - 1D: Resistance in bulk n-type doped silicon
• 18-Dec-2006
  - 1D: Ballistic current in a resonant tunneling diode (RTD)
• 07-Dec-2006
  - 1D: Electron concentration in doped semiconductors (Si, Ge, GaAs) - Compensated semiconductors
• 24-Nov-2006
  - 3D: Biexciton correction in idealistic 3D cubic quantum dots
• 15-Nov-2006
  A new tutorial is available:
  - Energy dispersion of a cylindrically shaped GaN nanowire
• 01-Sep-2006
  Some new tutorials are available:
  - Scattering times for electrons in unbiased and biased single and multiple quantum wells
• 17-July-2006
  Some new tutorials are available:
  - 1D: Parabolic quantum well
  - 1D: Poisson-Boltzmann equation: The Gouy-Chapman solution
  - 2D: Landau levels in bulk GaAs (magnetic field)
  - 2D: Fock-Darwin states of a 2D parabolic potential (magnetic field)
  - 3D: Cleaved edge overgrowth quantum dots (CEO QDs)
• 02-May-2006
  Some new tutorials are available:
  - 1D: p-Si / SiO₂ / poly-Si structure (MOSFET with inversion channel due to applied gate voltage)
  - 1D: InAs / In_0.4Ga_0.6Sb superlattice dispersion with 8x8 k.p (type-II band alignment)
  - 1D: InAs / GaSb broken gap quantum well (BGQW)
  - 1D: Intersubband transitions in InGaAs/AlInAs multiple quantum well systems
  - 1D: Si/SiGe MODQW (Modulation Doped Quantum Well)
  - 1D: k_|| energy dispersion of holes in a GaN/AlGaN quantum well
  - 1D: Band gap of strained AlGaInP on GaAs substrate
  - 2D: Electron wave functions of a 2D slice of a Triple Gate MOSFET
  - 2D: Double Gate MOSFET (quantum mechanical calculation)
  - 3D: Nanocrystals
• 16-Sep-2004
  Some new tutorials are available:
  - 1D: Optical absorption of an InGaAs quantum well
  - 1D: k.p dispersion in bulk GaAs
  - 1D: k.p dispersion in strained GaN (wurtzite)
  - 1D: strained silicon
  - 1D: k_|| energy dispersion of holes in unstrained and strained silicon inversion layers
  - 1D: Dispersion in infinite superlattices: Minibands
  - 1D: Single-band ('effective-mass') is a special case of 8x8 k.p ('8x8kp') if the electrons are decoupled from the holes
          Calculating the quantum mechanical density within the single-band approximation and 8x8 k.p self-consistently
          Calculation of the quantum mechanical density from the k.p dispersion (no self-consistency)
  - 1D: n-i-n Si resistor
  - 1D: Triangular well
  - 1D: Double quantum well
  - 1D: Quantum Confined Stark Effect
  - 1D: Exciton correction in 1D quantum wells
  - 1D: Quantum Cascade Laser
  - 1D: Intraband transitions
  - 1D: Schrödinger-Poisson
  - 1D: pn-junction
  - BIO-1D: Electrolyte Gate AlGaN/GaN Field Effect Transistor as pH Sensor
  - BIO-1D: Si-SiO₂ electrolyte sensor
  - BIO-1D: Detection of proteins with a SOI (silicon-on-insulator) electrolyte sensor
  - 2D: Quantum corral
  - 2D: Double Gate MOSFET (Metal Oxide Semiconductor Field Effect Transistor)
  - 2D: I-V characteristics of an n-doped and n-i-n-doped Si structure
  - 2D: Hole wave functions in a quantum wire subjected to a magnetic field
  - 1D/2D: I-V characteristics of an n-doped GaN single layer (available on request, contact: stefan.birner@nextnano.de)
  - 2D: Electron and hole wave functions in a T-shaped quantum wire grown by CEO (cleaved edge overgrowth)
  - 2D: Electron and hole wave functions in a strained T-shaped quantum wire grown by CEO (cleaved edge overgrowth)
  - 3D: Cubic and cuboidal shaped quantum dots
  - 3D: Hexagonal shaped GaN quantum dot embedded in AlN (wurtzite)
  - 3D: Exciton correction in idealistic 3D cubic quantum dots
  - 3D: Energy levels in a pyramidal shaped InAs/GaAs quantum dot including strain and piezoelectric fields
• 12-Mar-2004
  A new nextnano³ version is available for download: nextnano3_2004_08_24
• 08-Apr-2004
  A new 1D tutorial was added: GaN/AlN wurtzite structure: Strain, piezo and pyroelectric charges in wurtzite
• 12-Mar-2004
  A new nextnano³ version is available for download: nextnano3_2004_03_12
• 24-Jan-2004
  A new 1D tutorial was added: Strain: Band shifts and splittings due to conduction and valence band deformation potentials
• 16-Jan-2004
  A new 1D tutorial was added: Energy dispersion of holes in a quantum well
•  08-Jan-2002
  Input file generator for 1D