<div dir="ltr"><div><div>Dear All,</div><div><br></div><div>I want to apply E field to the slab.</div><div><br></div><div> I have correctly obtained the band structure without E field same as they did (page - 3) <a href="http://journals.aps.org/prb/abstract/10.1103/PhysRevB.91.085423">http://journals.aps.org/prb/abstract/10.1103/PhysRevB.91.085423</a> . But The problem occur when I apply E field. For example, They obtained the band structure with nearly 0.5 eV band gap under 5.4 V/nm( eamp = 0.0105, I guess)(page-8). But I got the results in both band structure and band gap, differently. I think I made a mistake. what is the mistate I did? Actually, I really dont know how to apply e field correctly. </div><div><br></div><div><br></div><div>Input parameter are given below.</div><div><br></div><div>Thanks for advice </div></div><div><br></div><div>***</div><div><div><font size="1">&control</font></div><div><font size="1"> calculation='scf'</font></div><div><font size="1"> restart_mode='from_scratch',</font></div><div><font size="1"> prefix='As',</font></div><div><font size="1"> tstress = .true.</font></div><div><font size="1"> tprnfor = .true.</font></div><div><font size="1"> pseudo_dir ='/home/hakan/tubitak/espresso-5.2.0/pseudo/',</font></div><div><font size="1"> outdir='/home/hakan/tubitak/As/efield/out/',</font></div><div><font size="1">! etot_conv_thr = 1.0E-4,</font></div><div><font size="1">! forc_conv_thr = 1.0D-3,</font></div><div><font size="1"> wf_collect=.true.,</font></div><div><font size="1">! verbosity='high',</font></div><div><font size="1"> tefield=.true.,</font></div><div><font size="1"> /</font></div><div><font size="1">&system</font></div><div><font size="1">nbnd=10,</font></div><div><font size="1"> ibrav=0,celldm(1)=1.8897,</font></div><div><font size="1"> nat= 2, ntyp=1,</font></div><div><font size="1"> ecutwfc =30.0,</font></div><div><font size="1"> ecutrho=120,</font></div><div><font size="1"> emaxpos=0.50,</font></div><div><font size="1"> eopreg=0.10,</font></div><div><font size="1"> edir = 3,</font></div><div><font size="1"> eamp = 0.0105,</font></div><div><font size="1"> /</font></div><div><font size="1"> &electrons</font></div><div><font size="1"> conv_thr = 1.0d-10,</font></div><div><font size="1"> mixing_beta = 0.3,</font></div><div><font size="1"> electron_maxstep=1000,</font></div><div><font size="1"> mixing_mode='local-TF',</font></div><div><font size="1"> /</font></div><div><font size="1">!&ions</font></div><div><font size="1">!ion_dynamics='bfgs'</font></div><div><font size="1">!/</font></div><div><font size="1">!&cell</font></div><div><font size="1">!cell_dofree='2Dxy'</font></div><div><font size="1">!/</font></div><div><font size="1">CELL_PARAMETERS</font></div><div><font size="1">3.598204297 0.000000000 0.000000000</font></div><div><font size="1">1.799099198 3.116138270 0.000000000</font></div><div><font size="1">0.000000000 0.000000000 18.0000</font></div><div><font size="1">ATOMIC_SPECIES</font></div><div><font size="1">As 74.921595 As.pbe-n-van.UPF</font></div><div><font size="1">ATOMIC_POSITIONS {crystal}</font></div><div><font size="1">As 0.333333326 0.333333330 0.558616161</font></div><div><font size="1">As 0.666666674 0.666666670 0.481383839</font></div><div><font size="1">K_POINTS {automatic}</font></div><div><font size="1">31 31 1 0 0 0</font></div></div><div><br></div><div>-- <br><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><span style="font-size:12.8px"><br></span></div><div><span style="font-size:12.8px">Bahadır SALMANKURT</span></div><div><span style="font-size:12.8px">PhD student</span><span style="font-size:12.8px"><br></span></div><div><span style="font-size:12.8px">Sakarya University, TURKEY</span></div></div></div></div></div>
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