This topic concerns metals only.
After generating a GKK file (see topic_ElPhonInt), the Electron-Phonon Coupling (EPC) analysis is performed in anaddb, setting elphflag variable to 1. Most of the procedure is automatic, but can be lengthy if a large number of k-points is being used. The nqpath and qpath variables must be set, specifying a path in reciprocal space. anaddb generates files containing the phonon linewidths (suffixed _LWD) and frequencies ωqj (suffixed _BST) along qpath. One can calculate the nesting function n(q) = ∑kii' δ(εk,i) δ(εk+q,i') by setting prtnest to 1 (output to _NEST).
Compulsory input variables:
... elphflag@anaddb [ELectron-PHonon FLAG]
Basic input variables:
... kptrlatt@anaddb [K PoinT Reciprocal LATTice]
... nqpath@anaddb [Number of Q wavevectors defining a PATH]
... qpath@anaddb [Q wavevectors defining a PATH]
... telphint@anaddb [Technique for ELectron-PHonon INTegration]
Useful input variables:
... ep_int_gkk@anaddb [Electron-Phonon INTerpolation of GKK]
... ep_qptlist@anaddb [Electron Phonon Q PoinT LIST]
... ep_scalprod@anaddb [DO SCALar PRODuct for gkk matrix elements]
... ndivsm@anaddb [Number of DIVisions for the SMallest segment]
... prtnest@anaddb [PRinT the NESTing function]
... prtvol@anaddb [PRinT VOLume]
Input variables for experts:
... qgrid_type@anaddb [Q GRID TYPE]
... use_k_fine@anaddb [USE K-grid FINEr than the coarse k-grid]
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tests/tutorespfn/Input: teph_4.in teph_5.in
tests/v5/Input: t88.in t89.in t90.in t91.in t92.in t93.in t94.in t95.in t99.in
tests/v6/Input: t77.in t93.in t94.in t95.in
tests/v7/Input: t88.in
t93.in
t94.in
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