Hello,
I am using vasp to wannier90 then wannier tool to Calculate topological properties so I have a problem like in the Gamma_A direction in DFT there is only one band crossing point in A-AFM configuration when I am calculating Dirac Node by wannier tool I gett 4 Dirac points.Next when I am calculation the Weyl point for the FM configuration I also get 4 Weyl points. according to theory when the spin degeneracy breaks for FM configuration so a single Dirac point should be split into two Weyl points.my questions are like below
We can clearly see from the DFT band the is only one band crossing point for A_AFM (GGA+U+SO) moment along the c axis . But why I am getting 4 Dirac Nodes in the wanner tool calculation. even though my waanier90 band match very good with the DFT band and my average wannier centres spread is less than 5.The calculated Dirac points are given below. are they really 4 points or 2 points because in DFT band there is only one crossing point along Gamma-A diraction
-0.00015093 0.00005166 -0.00206984 0.00000000 0.00989653 -0.00011590 0.00009230 -0.00517366
0.00013190 -0.00003801 0.00165877 0.00000000 0.00983311 0.00010128 -0.00007592 0.00414618
0.00002591 -0.00016695 -0.00199750 0.00000000 0.00988852 0.00001989 -0.00012097 -0.00499283
-0.00010172 0.00016663 0.00203046 0.00000000 0.00989833 -0.00007811 0.00014986 0.00507523
I am attaching my DFT and wannier band fitting here
In Gamma - A direction for FM configuration (GGA+U+SO) I get 4 Weyl points which are all at the same energy level .
4 Wely points are here . are they really 4 or are they 2
0.00166302 -0.00010811 0.02060296 0.00000000 0.03667793 0.00127699 -0.00071039 0.02574901
-0.00162798 -0.00148270 0.02055089 0.00000000 0.03655875 -0.00125008 -0.00036095 0.02568394
0.00023698 0.00124945 -0.02064293 0.00000000 0.03668335 0.00018197 0.00073990 -0.02579896
-0.00048228 -0.00356871 -0.02021697 0.00000000 0.03641916 -0.00037033 -0.00218802 -0.02526661
Hello, I am using vasp to wannier90 then wannier tool to Calculate topological properties so I have a problem like in the Gamma_A direction in DFT there is only one band crossing point in A-AFM configuration when I am calculating Dirac Node by wannier tool I gett 4 Dirac points.Next when I am calculation the Weyl point for the FM configuration I also get 4 Weyl points. according to theory when the spin degeneracy breaks for FM configuration so a single Dirac point should be split into two Weyl points.my questions are like below
We can clearly see from the DFT band the is only one band crossing point for A_AFM (GGA+U+SO) moment along the c axis . But why I am getting 4 Dirac Nodes in the wanner tool calculation. even though my waanier90 band match very good with the DFT band and my average wannier centres spread is less than 5.The calculated Dirac points are given below. are they really 4 points or 2 points because in DFT band there is only one crossing point along Gamma-A diraction -0.00015093 0.00005166 -0.00206984 0.00000000 0.00989653 -0.00011590 0.00009230 -0.00517366 0.00013190 -0.00003801 0.00165877 0.00000000 0.00983311 0.00010128 -0.00007592 0.00414618 0.00002591 -0.00016695 -0.00199750 0.00000000 0.00988852 0.00001989 -0.00012097 -0.00499283 -0.00010172 0.00016663 0.00203046 0.00000000 0.00989833 -0.00007811 0.00014986 0.00507523
I am attaching my DFT and wannier band fitting here
In Gamma - A direction for FM configuration (GGA+U+SO) I get 4 Weyl points which are all at the same energy level . 4 Wely points are here . are they really 4 or are they 2 0.00166302 -0.00010811 0.02060296 0.00000000 0.03667793 0.00127699 -0.00071039 0.02574901 -0.00162798 -0.00148270 0.02055089 0.00000000 0.03655875 -0.00125008 -0.00036095 0.02568394 0.00023698 0.00124945 -0.02064293 0.00000000 0.03668335 0.00018197 0.00073990 -0.02579896 -0.00048228 -0.00356871 -0.02021697 0.00000000 0.03641916 -0.00037033 -0.00218802 -0.02526661