!Input file for the anaddb code. Analysis of the BaTiO3 DDB !Flags dieflag 2 ! 2=> electronic dielectric tensor only ifcflag 1 ! Interatomic force constant flag !Interatomic force constant info dipdip 1 ! Dipole-dipole interaction treatment ifcana 1 ! Analysis of the IFCs ifcout 21 ! Number of IFC's written in the output, per atom natifc 2 ! Number of atoms in the cell for which ifc's are analysed atifc 2 3 ! List of atoms !Wavevector grid number 1 (coarse grid, from DDB) brav 1 ! Bravais Lattice : 1-S.C., 2-F.C., 3-B.C., 4-Hex.) ngqpt 2 2 2 ! Monkhorst-Pack indices nqshft 1 ! number of q-points in repeated basic q-cell q1shft 3*0.0 !Wavevector list number 1 (Reduced coordinates and normalization factor) nph1l 7 ! number of phonons in list 1 qph1l 0.0 0.0 0.0 1.0 ! (G point) 0.5 0.0 0.0 1.0 ! (X point) 0.0 0.5 0.5 1.0 ! (M point) 0.5 0.5 0.5 1.0 ! (R point) 0.125 0.125 0.125 1.0 ! (1/4 along the Gamma-R line) 0.25 0.25 0.25 1.0 ! (1/2 along the Gamma-R line) 0.375 0.375 0.375 1.0 ! (3/4 along the Gamma-R line) !Wavevector list number 2 (Gamma point only, with limiting direction ! in cartesian coordinates. ) nph2l 1 ! number of phonons in list 2 qph2l 0.0 0.0 1.0 0.0 #%% #%% [setup] #%% executable = anaddb #%% input_ddb = t18.ddb.in #%% test_chain = t18.in, t19.in, t20.in, t21.in #%% [files] #%% files_to_test = #%% t19.out, tolnlines = 0, tolabs = 0.000e+00, tolrel = 0.000e+00 #%% [paral_info] #%% max_nprocs = 4 #%% [extra_info] #%% keywords = #%% authors = Unknown #%% description = #%% Analyze a DDB for BaTiO3, same as test18, but IFCs are #%% obtained from a 2x2x2 non-shifted grid (referred to as M1 #%% in the above-mentioned paper by Ghosez et al). #%% At q(1/8 1/8 1/8), the lowest frequency is i 178.8 cm-1 . #%% topics = Phonons, PhononBands #%%