Dear Iurii,<br><br>thanks for the info!<br>You can look in the original paper by P. Bloechl: PRB 49, 16223-16233(1994) (<a href="http://prb.aps.org/abstract/PRB/v49/i23/p16223_1">http://prb.aps.org/abstract/PRB/v49/i23/p16223_1</a>).<br>
<br>Best regards,<br>Maxim.<br><br><div class="gmail_quote">2011/3/15 Iurii TIMROV <span dir="ltr"><<a href="mailto:iurii.timrov@polytechnique.edu">iurii.timrov@polytechnique.edu</a>></span><br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
Dear Maxim, Dear All,<br>
<div class="im"><br>
> yes, you can. In order to do so, one has to comment the following (two)<br>
> lines in PW/input.f90:<br>
><br>
> IF( calculation /= 'nscf' ) CALL errore( 'iosys', &<br>
> 'tetrahedra should be used only for calculation of DOS', 1 )<br>
><br>
<br>
</div>These lines are present in PW/input.f90 of espresso-4.2.1<br>
<br>
In espresso-4.3a you will find somewhat different:<br>
<br>
! replace "errore" with "infomsg" in the next line if you really want<br>
! to perform a calculation with forces using tetrahedra<br>
!<br>
IF( lforce ) CALL errore( 'iosys', &<br>
'force calculation with tetrahedra not recommanded: use smearing',1)<br>
<div class="im"><br>
> Mind, that 'tetrahedra' has to be used for DOS or SCF only, forces and<br>
> stresses are<br>
> not reliable it this case (they are not variational).<br>
<br>
</div>Could you recommend some paper where this statement was<br>
mentioned/discussed/proved? Thanks!<br>
<br>
Best regards,<br>
Iurii Timrov<br>
<font color="#888888"><br>
<br>
Iurii TIMROV<br>
Doctorant (PhD student)<br>
Laboratoire des Solides Irradies<br>
Ecole Polytechnique<br>
F-91128 Palaiseau<br>
+33 1 69 33 45 08<br>
<a href="mailto:timrov@theory.polytechnique.fr">timrov@theory.polytechnique.fr</a><br>
</font><div><div></div><div class="h5"><br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br>Best regards, Max Popov<br>Ph.D. student<br>Materials center Leoben (MCL), Leoben, Austria.<br>