IPEAD

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Revision as of 14:23, 8 April 2022 by Karsai (talk | contribs)

IPEAD = 1 | 2 | 3 | 4
Default: IPEAD = 4 

Description: IPEAD specifies the order of the finite difference stencil used to compute the derivative of the cell-periodic part of the orbitals w.r.t. k, |∇kunk⟩ (LPEAD=.TRUE.), and the derivative of the polarization w.r.t. the orbitals, δP/δ⟨ψnk| for (LCALCEPS=.TRUE., or EFIELD_PEAD0).


Related tags and articles

LPEAD, LCALCEPS, EFIELD_PEAD, Berry phases and finite electric fields

Examples that use this tag