<p dir="ltr">Hi Habib</p>
<p dir="ltr">You should have a look to the eigenvalues you obtained in the non self consistent computation you made before doing the pdos. </p>
<p dir="ltr">Have you tried to compute the dos using the dos.x program using those same eigenvalues ?</p>
<p dir="ltr">Also check, in the standard output of projwfc.x what are the projections for the eigenfunctions close to the band edges</p>
<p dir="ltr"> <br>
Greetings - Pietro<br>
</p>
<div class="gmail_extra"><br><div class="gmail_quote">Il 09 set 2016 5:01 PM, "Ullah, Habib" <hu203@exeter.ac.uk> ha scritto:<br type="attribution"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p>Dear QE Users,</p>
<p> </p>
<p>I am calculating the DOS/PDOS and Band Structure of BiVO4 but getting different band gaps. i.e., in case of DOS/PDOS the band gap is 2.1 eV while in the band structure simulations, it is 1.40 eV. I am using the same pseudopotentials for
these simulations. Any one knows, where I am doing the mistake??</p>
<p>Kind regards</p>
<p>Habib</p>
<p> </p>
<p>The input/script for the PDOS is!</p>
<p> </p>
<p>&PROJWFC</p>
<p> outdir = '/home/ISAD/hu203/Test/BiVO4/' ,</p>
<p> prefix = 'BiVO4'</p>
<p> degauss = 0.02,</p>
<p> filpdos = 'BiVO4.pdos' ,</p>
<p> Emin = -25.0,</p>
<p> Emax = 25.0,</p>
<p> DeltaE = 0.01,</p>
<p>/</p>
<p> </p>
<p>While for the band structure simulations, the input is!</p>
<p> </p>
<p>&CONTROL</p>
<p> calculation='bands',</p>
<p> outdir='/home/ISAD/hu203/Bismuth/BiVO4_Bulk/Optimized-BiVO4/',</p>
<p> prefix='BiVO4-bulk',</p>
<p> pseudo_dir='/home/ISAD/hu203/habib/espresso-5.0.3/pseudo/',</p>
<p> verbosity='high',</p>
<p> tstress=.false.,</p>
<p> tprnfor=.false.,</p>
<p>/</p>
<p>&SYSTEM</p>
<p> ibrav=6,</p>
<p> celldm(1)=9.7264200532d0, celldm(3)=2.2773654464d0,</p>
<p> nat=24,</p>
<p> ntyp=3,</p>
<p> ecutwfc=50.0d0,</p>
<p> ecutrho=500.0d0,</p>
<p> input_dft='LDA',</p>
<p> occupations='smearing',</p>
<p> smearing='Marzari-Vanderbilt',</p>
<p> degauss=0.002000d0,</p>
<p>/</p>
<p>&ELECTRONS</p>
<p> diagonalization='david',</p>
<p> conv_thr=1d-06,</p>
<p> mixing_mode='plain',</p>
<p> mixing_beta=0.700d0,</p>
<p>/</p>
<p>&IONS</p>
<p>ion_dynamics='bfgs'</p>
<p>/</p>
<p>&CELL</p>
<p>cell_dynamics='bfgs'</p>
<p>/</p>
<p>ATOMIC_SPECIES</p>
<p> Bi 208.980000d0 Bi.pz-hgh.UPF</p>
<p> O 15.999400d0 O.pz-hgh.UPF</p>
<p> V 50.941500d0 V.pz-n-nc.UPF</p>
<p> </p>
<p>ATOMIC_POSITIONS {alat}</p>
<p> Bi -0.000000471 0.249996017 1.423344718</p>
<p> Bi 0.000000471 0.750003983 0.854020728</p>
<p> Bi 0.500000213 0.749997379 0.284678980</p>
<p> Bi 0.499999787 0.250002621 1.992686467</p>
<p> V -0.000003024 0.249994359 0.284670658</p>
<p> V 0.000003024 0.750005641 1.992694788</p>
<p> V 0.499995001 0.749991398 1.423364351</p>
<p> V 0.500004999 0.250008602 0.854001096</p>
<p> O 0.155441724 0.505701408 0.475790644</p>
<p> O 0.844558291 0.494298592 1.801574768</p>
<p> O 0.344551861 0.494281095 1.614473212</p>
<p> O 0.655448139 0.505718905 0.662892234</p>
<p> O 0.244301959 0.405442926 1.045129589</p>
<p> O 0.755698041 0.594557074 1.232235857</p>
<p> O 0.255708742 0.594561054 2.183807364</p>
<p> O 0.744291258 0.405438946 0.093558117</p>
<p> O 0.655440753 1.005707807 1.614459537</p>
<p> O 0.344559247 -0.005707807 0.662905910</p>
<p> O 0.844558823 -0.005710586 0.475801005</p>
<p> O 0.155441192 1.005710586 1.801564407</p>
<p> O 0.744296280 0.905441554 2.183811886</p>
<p> O 0.255703720 0.094558431 0.093553594</p>
<p> O 0.755708996 0.094565293 1.045123098</p>
<p> O 0.244291004 0.905434692 1.232242348</p>
<p> </p>
<p>K_POINTS {crystal_b}</p>
<p>11</p>
<p> 0.0000000000 0.0000000000 0.0000000000 50 ! G</p>
<p> 0.0000000000 0.5000000000 0.0000000000 50 ! X</p>
<p> 0.0000000000 0.5000000000 0.5000000000 50 ! R</p>
<p> 0.0000000000 0.0000000000 0.5000000000 50 ! Z</p>
<p> 0.0000000000 0.0000000000 0.0000000000 50 ! G</p>
<p> 0.5000000000 0.5000000000 0.0000000000 50 ! M</p>
<p> 0.5000000000 0.5000000000 0.5000000000 50 ! A</p>
<p> 0.0000000000 0.0000000000 0.5000000000 50 ! Z</p>
<p> 0.5000000000 0.0000000000 0.5000000000 50 ! R</p>
<p> 0.5000000000 0.0000000000 0.0000000000 50 ! X</p>
<p> 0.0000000000 0.0000000000 0.0000000000 50 ! G</p>
<p> </p>
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