<div dir="ltr"><br><span id="result_box" class="" lang="en">Deal QE Users<br><span class="">I tried to</span> <span class="">make a calculation of</span> <span class="">GaN</span> <span class="">on the espresso code,</span> <span class="">it gives me a</span> <span class="">gap</span> value  <span class="">of</span> <span class="">0.59</span> <span class="">eV</span> <span class="">while</span>  <span class="">Eg</span> <span class="">(Exp)=</span> <span class="">3.4</span> <span class="">eV</span> <span class="">is</span> <span class="">there</span> any <span class=""> method</span> <span class="">to approximate</span> <span class="">to the</span> <span class="">experimental</span> one.?<span class=""></span></span></div>