<div dir="ltr"><div><div><div><div><div>Dear QE users<br></div>I am trying to model amorphous Si using heat-and-quench by BO molecular dynamics (based on example3). My starting temperature is 1600K. But, In my output file, after every step, I see a different instantaneous temperature printed. Why is that so? Am I missing any input parameter? My input file is as given below:<br>
<br> &control<br> calculation='md'<br> restart_mode='from_scratch',<br> prefix = 'Si'<br> pseudo_dir = '/home/deva/espresso-5.0.1/pseudo/',<br> outdir='./',<br>
dt=20,<br> nstep=60,<br> disk_io='high'<br> /<br> &system<br> ibrav= 1, celldm(1)=10.18, nat= 8, ntyp= 1,<br> ecutwfc = 20.0, nosym=.true.<br> /<br> &electrons<br> conv_thr = 1.0d-8,<br>
mixing_beta = 0.7<br> /<br> &ions<br> ion_dynamics='verlet'<br> pot_extrapolation='second-order'<br> wfc_extrapolation='second-order'<br> ion_temperature='reduce-T'<br>
tempw=1600.D0<br>
delta_t=-400.D0<br> nraise=20<br> /<br>ATOMIC_SPECIES<br> Si 28.086 Si.pz-vbc.UPF<br>ATOMIC_POSITIONS<br> Si -0.123 -0.123 -0.123<br> Si 0.377 0.377 -0.123<br> Si 0.377 -0.123 0.377<br> Si -0.123 0.377 0.377<br>
Si 0.123 0.123 0.123<br> Si 0.623 0.623 0.123<br> Si 0.623 0.123 0.623<br> Si 0.123 0.623 0.623<br>K_POINTS {automatic}<br> 1 1 1 0 0 0<br><br></div>Thanks in advance<br></div>Devan<br></div><div>PhD student<br>
</div>UMD<br></div>College Park<br></div>