abinit/tests/tutorespfn/TutoNLO/README

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TUTORIAL ON LINEAR AND NON-LINEAR RESPONSES TO ELECTRIC FIELDS
Summary_NLO.txt
summary of the results obtained for various properties using either
response function or finite difference techniques.
P0-STRUCT
structural optimization of AlAs to be used all along the tutorial
(i.e. recomputed with the convergence parameters of the tutorial)
P1-DFPT
Linear and non-linear responses of AlAs to electric field and
atomic displacements using DFPT.
P2-BERRY
Berry phase calculation under zero field to get different linear
and non-linear responses from finite differences
P3-EFIELD
Finite electric field calculation using the method of Souza and
Vanderbilt, to get different linear and non-linear responses
from finite differences.