<div dir="ltr"><div dir="ltr"><div>Dear Wien community,</div><div><br></div><div>I am performing LDA+U
type calculation for SmCo5, and interested in look in the role of Co in
generating large magnetic anisotropy for this materials.</div><div> </div><div>(i) First i ran a LDA+U calculation with U of 5 eV on Sm, with the following case.inorb file. Everything worked fine.</div><div><br></div><div>1 1 0 nmod, natorb, ipr<br>PRATT 1.0 BROYD/PRATT, mixing<br>1 1 3 iatom nlorb, lorb<br>1 nsic 0..AFM, 1..SIC, 2..HFM<br>0.367 0.00 U J (Ry) Note: we recommend to use U_eff = U-J and J=0</div><div><br></div><div>(ii) then I included U of 3 eV at Co sites, in the following case.inorb input file. Everything worked fine.</div><div>1 6 0 nmod, natorb, ipr<br>PRATT 1.0 BROYD/PRATT, mixing<br>1 1 3 iatom nlorb, lorb</div><div>2 1 2 iatom nlorb, lorb</div><div>3 1 2 iatom nlorb, lorb</div><div>4 1 2 iatom nlorb, lorb</div><div>5 1 2 iatom nlorb, lorb</div><div>6 1 2 iatom nlorb, lorb</div><div>1 nsic 0..AFM, 1..SIC, 2..HFM<br>0.367 0.00 U J (Ry) Note: we recommend to use U_eff = U-J and J=0</div><div>0.220 0.00 U J (Ry) Note: we recommend to use U_eff = U-J and J=0</div><div>0.220 0.00 U J (Ry) Note: we recommend to use U_eff = U-J and J=0</div><div>0.220 0.00 U J (Ry) Note: we recommend to use U_eff = U-J and J=0</div><div>0.220 0.00 U J (Ry) Note: we recommend to use U_eff = U-J and J=0</div><div>0.220 0.00 U J (Ry) Note: we recommend to use U_eff = U-J and J=0</div><div><br></div><div>(iii) At last I wanted to do a calculation with U just at Co site. I use the following case.inorb input file:</div><div><br></div><div><div>1 5 0 nmod, natorb, ipr<br>PRATT 1.0 BROYD/PRATT, mixing<br></div><div>2 1 2 iatom nlorb, lorb</div><div>3 1 2 iatom nlorb, lorb</div><div>4 1 2 iatom nlorb, lorb</div><div>5 1 2 iatom nlorb, lorb</div><div>6 1 2 iatom nlorb, lorb</div><div>1 nsic 0..AFM, 1..SIC, 2..HFM<br><div>0.220 0.00 U J (Ry) Note: we recommend to use U_eff = U-J and J=0</div><div>0.220 0.00 U J (Ry) Note: we recommend to use U_eff = U-J and J=0</div><div>0.220 0.00 U J (Ry) Note: we recommend to use U_eff = U-J and J=0</div><div>0.220 0.00 U J (Ry) Note: we recommend to use U_eff = U-J and J=0</div><div>0.220 0.00 U J (Ry) Note: we recommend to use U_eff = U-J and J=0</div><div><br></div><div>This run HOWEVER gives an error in case.outputorbup/dn file</div><div><br></div><div><br></div><div><br></div><div> Conflict in atom indexes: iatom 2 ne jatom 1</div></div><div><br></div><div><br></div><div><br></div><div>This will works if I put U = 0eV at Sm in step (2). But before proceeding I wanted to clarify the following</div><div><br></div><div>(I) Is this expected behavior ?</div><div><br></div><div>(II) If I put a U of 0 eV at Sm, will that mimic a calculation with U only at Co site?</div><div><br></div><div><br></div><div>I
can make this work by swapping the atom (putting the Co first) in the
structure files, but then I will have to restart the entire run.</div><div><br></div><div>Your suggestions and thoughts are much appreciated.</div><div><br></div><div>Thanks in advance.</div><div><br></div><div><br></div><div>Regards,</div><div>David Yang</div></div></div></div>