<div dir="ltr"><div>Dear Wien2k developers/users,</div><div>hi,</div><div>i'm trying to calculate the parity of bands at different K-points (with inclusion of SOC) </div><div><br clear="all"></div><div>I used the script "$irrep -so" but it seems that space group of my system is non-symmorphic.<div>also the k-point i'm interested in lies on the edge of 1st BZ</div><div><br></div><div>the output is as following:</div><div><br></div><div>"<br>knum = 1 kname= 1<br>k = 0.500000 0.500000 0.000000</div><div> The point group is D4h<br> 16 symmetry operations in 10 classes<br> Table 40 on page 50 in Koster et al [7]<br> Table 33.4 on page 258 in Altmann et al [8]</div><div> E 2C4 C2 2C2` 2C2" I 2IC4 IC2 2IC2` 2IC2"<br> G1+ A1g 1 1 1 1 1 1 1 1 1 1<br> G2+ A2g 1 1 1 -1 -1 1 1 1 -1 -1<br> G3+ B1g 1 -1 1 1 -1 1 -1 1 1 -1<br> G4+ B2g 1 -1 1 -1 1 1 -1 1 -1 1<br> G5+ Eg 2 0 -2 0 0 2 0 -2 0 0<br> G1- A1u 1 1 1 1 1 -1 -1 -1 -1 -1<br> G2- A2u 1 1 1 -1 -1 -1 -1 -1 1 1<br> G3- B1u 1 -1 1 1 -1 -1 1 -1 -1 1<br> G4- B2u 1 -1 1 -1 1 -1 1 -1 1 -1<br> G5- Eu 2 0 -2 0 0 -2 0 2 0 0<br> --------------------------------------------------------------------<br> G6+ E1/2g 2 /2 0 0 0 2 /2 0 0 0<br> G7+ E3/2g 2 -/2 0 0 0 2 -/2 0 0 0<br> G6- E1/2u 2 /2 0 0 0 -2 -/2 0 0 0<br> G7- E3/2u 2 -/2 0 0 0 -2 /2 0 0 0</div><div><br></div><div> labeling of IRs can change due to choice of<br> symmetry axes: G3 <-> G4</div><div><br></div><div> Non-symmorphic crystal and k-point at the BZ surface:<br> IR of the space group for this k-point cannot simple<br> be expressed as IR of the corresponding point group<br> times a phase factor, since exp(-i*k(Ri*tj-tj)) not 1<br> for all pair of {Ri|ti} and {Rj|tj}.</div><div><br></div><div> WILL BE IMPLEMENTED</div><div><br>********************************************************************************<br>"</div><div><br></div><div>i guess now i need some way around this problem.</div><div><br></div><div>any help will be highly appreciated.</div></div><div><br>-- <br></div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><strong><u>M. Arshad Farhan</u></strong><br>EMMG, Physics Division<br>PINSTECH, Islamabad<br><br></div></div>
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