<div dir="ltr"><div>Dear Users</div><div><br></div><div>I have computed PF for bulk Na and its value is <font color="#ff0000"><b>5.943 eV</b></font> with k-mesh <font color="#ff0000"><b>18*18*18</b></font>.</div><div><br></div><div>Then I constructed a supercell 1*1*6 and run the calculation with different k-meshes and obtained PF values. The details are </div><div><br></div><div><b>K-mesh PF (x/z components in eV)</b></div><div><b><br></b></div><div><div><b>24*24*24 5.7097 / 5.8192</b></div><div><b><br></b></div><div><b>36*36*24 5.7614 / 5.8098 <br></b></div><div><b><br></b></div><div><b>50*50*10 5.9358 / 5.6280 <br></b></div><div><b><br></b></div><div><b>50*50*30 5.9365 / 5.8079</b><br></div><div> </div><div>My question is why PF is very sensitive to k-mesh selection? and which value of PF is required for correct dielectric constant calculation? Do I need <b><font color="#ff0000">PF = 5.943 eV</font></b> for the supercell and then, definitely, need more test calculation for right k-mesh selection?</div><div><br></div></div>-- <br><div class="gmail_signature"><div dir="ltr"><div>Kind Regards</div><div>Muhammad Sajjad </div><div>Post Doctoral Fellow</div><div>KAUST, KSA.</div></div></div>
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