tefield LOGICAL ( default = .FALSE. ) If .TRUE. a sawlike potential is added to the bare ionic potential.
iedir INTEGER 1, 2 or 3. Used only if tefield is .TRUE.. The direction of the electric field is parallel to the bg(:,edir) reciprocal lattice vector ( So the potential is constant in planes defined by the mesh points ) emaxpos REAL ( default = 0.5D0 ) Position of the maximum of the sawlike potential within the unit cell ( 0 < emaxpos < 1 ) eopreg REAL( default = 0.1D0 ) Part of the unit cell where the sawlike potential decreases. ( 0 < eopreg < 1 ) eamp REAL ( default = 0.001 a.u. ) Amplitude of the electric field (in a.u.) ( 1 a.u. = 51.44 10^10 V/m )