Dear all<br> I was trying to calculate work function of <b>Au(111)</b> surface using Quantum Espresso 4.2.1. I used a 9 layer slab along with 22<span class="st">Å vacuum. I first did a relax calculation and then post processing to extract potential (sum of Coulomb potential and Hartree part ) . Then took the planar average of this potential. I got a strange graph which I have attached with this mail. </span><span class="st"><em></em></span><br>
<br>1 Why shape of graph is coming like this ?<br>2 What is the need of excluding exchange correlation potential in calculating Work function ?<br><br>I changed the pseudo potential and obtained same pattern of graph.<br>
<br>Any help will be much appreciated.<br><br>Vasudevan M V<br>JNCASR<br>Bangalore<br><br><pre><br></pre><br>