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L-INVARIANTS

Universal model builder (Lattice, Electron, Spin):

  • Displacement and magnetic modes analysis
  • INVARIANT generator (couplings among distortion, strain and magnetic)
  • Modulate modes in supercell, generate initial Domain walls (DWs) structures for Density Functional Theory (DFT) codes
  • Landau model builder, Generate DFT training sets by phonon and magnetic frozen-in.
  • Heisenberg model with DM model builder
  • Tight-Binding model builder
  • Finite Element Method (FEM), Minimization, molecular dynamics (MD), monte Carlo (MC), and Finite Differences nonlinear solver on large scale continuous model
  • Generate Fortran source code from mathematica
  • openmp parallelization
  • dynamics under external electric field
  • Jij of Heisenberge model from DFT, in Liechtenstein manner
  • Unfolding
  • phonon/magnon calulation from DFT input
  • X ray diffraction simulation
  • Nudged Elastic Bands (NEB) and Growing String Method (GSM) to explore the phase transition, dynamics, and domain wall structures
  • Mollwide projection
  • Examples: Boracite, Perovskite (To be added: Spinel, Rutile, Pyrochlore)

Todo:

  • implement LLG dynamics
  • implement k dot p model builder
  • interface to exact diagnalization method
  • adding Atomistic Green's Function (AGF) method to study scattering and ultrafast non-equilibrium dynamics
  • including electron phonon coupling (EPC) by fitting phonon dependent Tight-Binding (TB) model from DFT molecular dynamics (MD).

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Phase field / Ladau model builder

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