Linear response
Apart from ground-state properties, VASP can compute how a system reacts to external perturbations. If the perturbation is small, the response is in the linear regime and thus linear response theory can be applied.
Further resources
For lectures, check here:
- Linear response by Henrique Miranda
Also check out the linear response category on the VASP Wiki for a detailed documentation of the type of perturbations implemented in VASP.