<pre>Dear Giovanni,<br><br>Thanks a lot for helping me out. With regard to your suggestions<br><br>1. The calculations converge w.r.t nbnds. The energy values for nbnds=10 and nbnds=40 are identical with ecutwfc=50 and ecutrho=500.<br>
2. With regard to degauss value how should I perform the convergence?<br> Should I just increase it from say 0.02Ry to 0.06Ry and study the energy values?<br> While searching the forums I came across this thread <br> <a href="http://www.democritos.it/pipermail/pw_forum/2008-January/008157.html">http://www.democritos.it/pipermail/pw_forum/2008-January/008157.html</a><br>
which tells me that I should find a k-point set and a smearing value that kind of complement each other. So how do I do that? <br>3. I have a question regarding k point test.<br> I always thought that the calculations were performed per k point and then summed up to find the total integral value. <br>
So, is it not enough to have a moderate sized k point mesh initially to test out the convergence of the <br> ecutwfc values and then followed by a k point convergence test?<br><br>4. Lastly, I find ecutrho every time I update ecutwfc when I had formed that table.<br>
<br>I once again thank you for helping me out. <br></pre><pre>Regards<br><br>Meenakshi Sundaram<br>Graduate Student<br>Mechanical and Aerospace Engg.<br>Cornell<br></pre>