DFTB Manual 2023.1¶
The DFTB engine implements Density Functional based Tight-Binding methods, which can be viewed as computationally very efficient approximations to density functional theory (DFT). As such it is a good engine for computationally fast calculations that still include quantum effects. It can be used for molecules and for systems of any periodicity (3D, 2D and 1D).
Graphical user interface (GUI) tutorials:
Table of Contents:
- General
- AMS driver’s tasks and properties
- Model Hamiltonians
- Spectroscopy and properties
- Electronic transport (NEGF)
- Charge transport (transfer integrals)
- Examples
- Model Hamiltonians
- Example: SCC-DFTB aspirin
- Example: Smeared Fermi-Dirac occupations
- Example: Periodic aspirin
- Example: GO aspirin DFTB-SCC
- Example: DFTB3 CH3COO-
- Example: DFTB3 dispersion
- Example: DFTB3 dispersion periodic
- Example: Unpaired electrons cyclobutadiene
- Example: Spin polarized O2
- Example: Orbital dependent spin-polarized CH
- Example: NaCl fractional coordinates
- Example: NaCl slab
- Example: OH- noSCC
- Example: OH- SCC
- Example: Single Point H2 MOF
- Example: Single point COF5
- Example: Single point COF5, 2D
- Example: Single point COF5, 3D
- Example: H+
- Example: geometry optimizations in solution
- Example: Precision: k-space integration
- Example: External potential at nuclei
- Example: Restart DFTB
- Example: System input from file
- Geometry Optimization
- Example: GO formaldehyde noSCC
- Example: GO formaldehyde SCC
- Example: GO aspirin SCMGO
- Example: GO H3COO- DFTB3
- Example: GO cyclobutadiene spin-polarized
- Example: GO cyclobutadiene unpaired electrons
- Example: GO ethane 0D, 1D, 2D, 3D
- Example: GO poly-ethyleen
- Example: Restarting a geometry optimization
- Example: GO with constraints
- Example: GO with restraints
- Example: GO BakerSet SCMGO
- Example: GO polyethylene SCMGO plams
- Example: geometry optimizations: automations
- Example: Geometry optimization for an excited state
- Example: Geometry optimization following a specific excited state
- PESScan, Linear Transit, Transition State, NEB
- Electronic structure of periodic systems
- Excited States
- Example: Fullerene excitations
- Example: Excitations Ir(ppy)3
- Example: Excitations Davidson algorithm
- Example: Excitations transition charges on the fly
- Example: Excitations exact diagonalization
- Example: Excited state gradients: plams
- Example: Excitations SOT filter
- Example: Orbital dependent DFTB: Excitations
- Example: Excitations benchmark
- Example: Test parallelization
- Vibrations, IR spectra, Normal Modes, VCD
- Example: GO and frequencies aspirin
- Example: Normal modes (frequencies) for aspirin
- Example: Frequencies H2O
- Example: Frequencies OH-
- Example: Frequencies H2 slab
- Example: GO and frequencies C60
- Example: Excited states frequencies
- Example: Vibration resolved electronic spectrum: plams
- Example: Vibrational circular dichroism
- Phonons
- Stress tensor, Elasticity
- Molecular Dynamics
- Electronic transport, NEGF
- Analysis
- Model Hamiltonians
- Parameterizations
- Required citations
- References
- Keywords