<div dir="ltr"><div><div><div>Dear Wien2k users,<br></div>I am running WIEN2k_14.2 on my Lenovo workstation with fedora 23. I want to calculate the band gap of C, Si, and Ge with the diamond structure.<br></div>To generate my struct file I used: No. of Atoms-1, Space group- 227_Fd-3m and a=b=c=3.567 and one carbon atom at (0,0,0). Then set RMT automatically (reduce RMT--0%). Then it set RMT to 1.18. I initiate calculation with all the default values and run SFC as there is no warning in the STDOUT. <br></div>But when I see the structure in the Xcrysden the figure is not looking like diamond structure. And the band plot shows no gap <br> <br><div><div><div><div><div><span style="background-color:rgb(0,255,0)">: GAP: -99999. Ry = -9999. eV ( metallic )<span style="background-color:rgb(0,0,0)"><span style=""></span></span><span style="background-color:rgb(0,0,255)"><span style=""></span></span></span><br><br><br></div><div>I have already tried the structure : Atom=1, FCC, a=3.567, one atom at (0,0,0) and other position at (0.25,0.25,0.25). This gives diamond-likee structure but in the STDOUT file it gives some warning like <br><pre><span style="background-color:rgb(0,255,0)">warning: !!! Struct file is not consistent with space group found.
Number and name of space group: 227 (F d -3 m) [origin choice 2]</span><br></pre><pre>and SCF gives error like<br><br><span style="background-color:rgb(0,255,0)">head: cannot open ‘WIEN2k.inm’ for reading: No such file or directory
head: cannot open ‘WIEN2k.inm’ for reading: No such file or directory
no WIEN2k.clmsum(_old) file found, which is necessary for lapw0 !
> stop error<br></span><br></pre><pre>Please suggest me about the struct file which will give the results for all like LDA, PBE and mGGAfunctionals <br></pre>Thanks <br></div><div>-- <br><div class="gmail_signature"><div dir="ltr">Abhilash Patra<div>Research Scholar(Ph.D.)</div><div>School of Physical science</div><div>NISER,BBSR</div></div></div>
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