目录

Spin-orbit coupling with noncollinear magnetization calculation

Spin-orbit coupling with noncollinear magnetization scf calculation for Fe

Input files

atom.config 

     1
 LATTICE
      1.43407025     1.43407025     1.43407025
     -1.43407025     1.43407025     1.43407025
     -1.43407025    -1.43407025     1.43407025
 POSITION
  26     0.00000000     0.00000000     0.00000000 0 0 0
 MAGNETIC_XYZ
  26  0 0 6

MAGNETIC_XYZ: specifies the initial magnetic moment in atom.config

etot.input 

 1  4
 JOB = SCF
 CONVERGENCE = difficult
 IN.PSP1 = Fe.SG15.PBE.SOC.UPF
 IN.ATOM = atom.config
 SPIN = 222
 Ecut = 50
 MP_N123 = 8 8 8 0 0 0 2 #NK1, NK2, NK3, SK1, SK2, SK3, FLAG_SYMM
 XCFUNCTIONAL = PBE

1.Spin: specifies spin polarization, 222:Spin-orbit coupling with noncollinear magnetization. 2.FLAG_SYMM: controls the symmetry operation, possible values:0, 1, 2, 3. 2 means: generate kpoints without any symmetry.

Cd.SG15.PBE.SOC.UPF, Se.SG15.PBE.SOC.UPF

Spin-orbit pseudopotential files need to be used.

Calculations

  1. You can submit PWmat tasks in different ways:
   mpirun -np 4 PWmat | tee output

Run the command directly 

   #!/bin/bash
   #PBS -N SCF
   #PBS -l nodes=1:ppn=4
   #PBS -q batch
   #PBS -l walltime=100:00:00
 
   ulimit -s unlimited
   cd $PBS_O_WORKDIR
 
   mpirun -np 4 PWmat | tee output

Submit the task with a pbs script

  1. After SCF calculation, you can read the final megnetic moment from REPORT or OUT.ATOMSPIN file.
grep "spin_xyz" REPORT | tail -1
>>>spin_xyz      = 0.49661188020102E-05  -.48919186091819E-05  0.24426253634560E+01

OUT.ATOMSPIN: 

     magnetization
 
 # of ion     x       y      z      tot_charge
 --------------------------------
  1         0.000  -0.000   2.443   16.000
 --------------------------------
 tot_cell    0.000  -0.000   2.443  16.000