Dear Padmaja,<br><br>These k-values are the k-points in high symmetry direction which you choose to plot the band structure. Automatic grid generated for "scf" calculation if often not suitable for band-structure plot so we choose a high symmetry direction and discretize the reciprocal space in that direction. These are called special k-points for band structure plot. You can write a small code to generate a mesh with given high symmetry special k-points. And regarding the answer to your second question the unit of the total energy is always in Ryd. Its not a very big issue to figure out. Generally the fermi energy and in few more cases the energy could be in eV. Hope this helps. <br>
<br><div class="gmail_quote">On Thu, Nov 17, 2011 at 11:17 PM, Padmaja Patnaik <span dir="ltr"><<a href="mailto:padmaja_patnaik@yahoo.co.uk">padmaja_patnaik@yahoo.co.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div><div style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); font-family: times new roman,new york,times,serif; font-size: 12pt;"><div>Dear all<br>I am using QE since last few yeras but still could not answer few questions a new student in my lab asked me. When we are doing band plot its a curve between k~E. In the input file we give ka values as,<br>
<br> 0.0 0.0 0.0 <br> 0.0 0.0 0.1 <br> 0.0 0.0 0.2 <br> 0.0 0.0 0.3 <br> 0.0 0.0 0.4 <br><br>then what how are we getting the k values to plot the band structure. The values in the data file looks different from these values. <br>
<br>Another question is, which unit is followed in QE? <br>a.u. (hbar = e^2 = m_e = 1, energy in Hartree) or Rydberg unit ( hbar=1, e^2=2, m_e=1/2, energy in rydberg).<br><br>Sometimes the output energy is given
in eV and sometimes in Rydberg. This is confusing that which unit is followed in QE.<br><br>please suggest on these two points. <br>Regards<span class="HOEnZb"><font color="#888888"><br><br></font></span></div><span class="HOEnZb"><font color="#888888"><div>
Padmaja Patnaik<br>Research Scholar<br>Dept of Physics<br>IIT Bombay<br>Mumbai, India</div></font></span></div></div><br>_______________________________________________<br>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Regards,<br>MOHNISH,<br>-----------------------------------------------------------------<br>Mohnish Pandey<div>BTech-Mtech, IIT Kanpur<br>Senior Project Associate,<br>
Department of Chemical Engineering,<br>IIT KANPUR, UP, INDIA<br>-----------------------------------------------------------------</div><br>