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<html>
<head>
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<title>dos.x: input description</title>
</head>
<body>
<a name="__top__"></a><table style="border-width: 0; table-layout: auto; width: 100%; text-align: left; vertical-align: top; background: #00395a;">
<tr><th style="margin: 3 3 3 10; background: #005789; background: linear-gradient(rgba(0,87,137,1),rgba(0,119,189,1)); color: #ffffee; ">
<h1 style="margin: 10 10 10 15; text-align: left;"> Input File Description </h1>
<h2 style="margin: 10 10 10 15; text-align: left;"> Program:
dos.x / PWscf / Quantum Espresso<span style="font-weight: normal;"> (version: 6.6)</span>
</h2>
</th></tr>
<tr><td style="padding: 10 3 3 3; background: #ffffff; color: #222222; ">
<blockquote style="margin-bottom: 2em;">
<h3>TABLE OF CONTENTS</h3>
<blockquote>
<p><a href="#idm3">INTRODUCTION</a></p>
<p><a href="#idm8">&DOS</a></p>
<blockquote>
<a href="#idm9">prefix</a> | <a href="#idm12">outdir</a> | <a href="#idm16">bz_sum</a> | <a href="#idm26">ngauss</a> | <a href="#idm30">degauss</a> | <a href="#idm33">Emin</a> | <a href="#idm34">Emax</a> | <a href="#idm37">DeltaE</a> | <a href="#idm39">fildos</a>
</blockquote>
<p><a href="#idm43">Notes</a></p>
<blockquote><a href="#idm44">Output</a></blockquote>
<blockquote><a href="#idm48">Important !</a></blockquote>
</blockquote>
</blockquote>
<blockquote>
<a name="idm3"></a><h3>INTRODUCTION</h3>
<blockquote><pre>
<b>Purpose of dos.x:</b>
calculates the Density of States (DOS)
(separated into up and down components for DSDA)
<b>Structure of the input data:</b>
============================
<b>&DOS</b>
...
<b>/</b>
IMPORTANT: since v.5 namelist name is &DOS and no longer &INPUTPP
</pre></blockquote>
</blockquote>
<a name="idm8"></a><a name="DOS"></a><table border="0" width="100%" style="margin-bottom: 20;">
<tr><th bgcolor="#ddcba6"><h2 style="margin: 10 10 10 15; text-align: left;"> Namelist: <span class="namelist"><span style="font-weight:normal">&</span>DOS</span>
</h2></th></tr>
<tr><td style="text-align: left; background: #ffebc6; padding: 5 5 5 30; "><table style="border-color: #505087; border-style: solid; border-width: 0; margin-bottom: 10; table-layout: auto; width: 800;"><tbody><tr><td>
<a name="idm9"></a><a name="prefix"></a><table width="100%" style="border-color: #b5b500; border-style: solid; border-width: 2; margin-bottom: 10; table-layout: auto; background-color: #FFFFFF;">
<tr>
<th align="left" valign="top" width="20%" style="background: #ffff99; padding: 2 2 2 10; ">prefix</th>
<td style="text-align: left; vertical-align: top; background: #ffffc3; padding: 2 2 2 5; ">CHARACTER</td>
</tr>
<tr>
<td style="text-align: right; vertical-align: top; background: #ffffc3; padding: 2 10 2 10; "><i>Default:</i></td>
<td style="text-align: left; vertical-align: top; background: #fff3d9; padding: 2 2 2 5; "> 'pwscf'
</td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
prefix of input file produced by pw.x
(wavefunctions are not needed)
</pre></blockquote></td></tr>
</table>
<div align="right" style="margin-bottom: 5;">[<a href="#__top__">Back to Top</a>]</div>
<a name="idm12"></a><a name="outdir"></a><table width="100%" style="border-color: #b5b500; border-style: solid; border-width: 2; margin-bottom: 10; table-layout: auto; background-color: #FFFFFF;">
<tr>
<th align="left" valign="top" width="20%" style="background: #ffff99; padding: 2 2 2 10; ">outdir</th>
<td style="text-align: left; vertical-align: top; background: #ffffc3; padding: 2 2 2 5; ">CHARACTER</td>
</tr>
<tr>
<td style="text-align: right; vertical-align: top; background: #ffffc3; padding: 2 10 2 10; "><i>Default:</i></td>
<td style="text-align: left; vertical-align: top; background: #fff3d9; padding: 2 2 2 5; ">
value of the <tt>ESPRESSO_TMPDIR</tt> environment variable if set;
current directory ('./') otherwise
</td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
directory containing the input data, i.e. the same as in pw.x
</pre></blockquote></td></tr>
</table>
<div align="right" style="margin-bottom: 5;">[<a href="#__top__">Back to Top</a>]</div>
<a name="idm16"></a><a name="bz_sum"></a><table width="100%" style="border-color: #b5b500; border-style: solid; border-width: 2; margin-bottom: 10; table-layout: auto; background-color: #FFFFFF;">
<tr>
<th align="left" valign="top" width="20%" style="background: #ffff99; padding: 2 2 2 10; ">bz_sum</th>
<td style="text-align: left; vertical-align: top; background: #ffffc3; padding: 2 2 2 5; ">CHARACTER</td>
</tr>
<tr>
<td style="text-align: right; vertical-align: top; background: #ffffc3; padding: 2 10 2 10; "><i>Default:</i></td>
<td style="text-align: left; vertical-align: top; background: #fff3d9; padding: 2 2 2 5; ">
'smearing' if degauss is given in input;
options read from the xml data file otherwise.
</td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote>
<pre style="margin-bottom: -1em;"> Keyword selecting the method for BZ summation. Available options are:
</pre>
<dl style="margin-left: 1.5em;">
<dt><tt><span class="flag">'smearing'</span> :</tt></dt>
<dd><pre style="margin-top: 0em; margin-bottom: -1em;">
integration using gaussian smearing. In fact currently
any string not related to tetrahedra defaults to smearing;
</pre></dd>
</dl>
<dl style="margin-left: 1.5em;">
<dt><tt><span class="flag">'tetrahedra'</span> :</tt></dt>
<dd><pre style="margin-top: 0em; margin-bottom: -1em;">
Tetrahedron method, Bloechl's version:
P.E. Bloechl, <a href="https://journals.aps.org/prb/abstract/10.1103/PhysRevB.49.16223">PRB 49, 16223 (1994)</a>
Requires uniform grid of k-points, to be
automatically generated in pw.x.
</pre></dd>
</dl>
<dl style="margin-left: 1.5em;">
<dt><tt><span class="flag">'tetrahedra_lin'</span> :</tt></dt>
<dd><pre style="margin-top: 0em; margin-bottom: -1em;">
Original linear tetrahedron method.
To be used only as a reference;
the optimized tetrahedron method is more efficient.
</pre></dd>
</dl>
<dl style="margin-left: 1.5em;">
<dt><tt><span class="flag">'tetrahedra_opt'</span> :</tt></dt>
<dd><pre style="margin-top: 0em; margin-bottom: -1em;">
Optimized tetrahedron method:
see M. Kawamura, <a href="https://journals.aps.org/prb/abstract/10.1103/PhysRevB.89.094515">PRB 89, 094515 (2014)</a>.
</pre></dd>
</dl>
</blockquote></td></tr>
</table>
<div align="right" style="margin-bottom: 5;">[<a href="#__top__">Back to Top</a>]</div>
<a name="idm26"></a><a name="ngauss"></a><table width="100%" style="border-color: #b5b500; border-style: solid; border-width: 2; margin-bottom: 10; table-layout: auto; background-color: #FFFFFF;">
<tr>
<th align="left" valign="top" width="20%" style="background: #ffff99; padding: 2 2 2 10; ">ngauss</th>
<td style="text-align: left; vertical-align: top; background: #ffffc3; padding: 2 2 2 5; ">INTEGER</td>
</tr>
<tr>
<td style="text-align: right; vertical-align: top; background: #ffffc3; padding: 2 10 2 10; "><i>Default:</i></td>
<td style="text-align: left; vertical-align: top; background: #fff3d9; padding: 2 2 2 5; "> 0
</td>
</tr>
<tr>
<td style="text-align: right; vertical-align: top; background: #ffffc3; padding: 2 10 2 10; "><i>Status:</i></td>
<td style="text-align: left; vertical-align: top; background: #fff3d9; padding: 2 2 2 5; "> optional
</td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
Type of gaussian broadening:
= 0 Simple Gaussian (default)
= 1 Methfessel-Paxton of order 1
= -1 "cold smearing" (Marzari-Vanderbilt-DeVita-Payne)
=-99 Fermi-Dirac function
</pre></blockquote></td></tr>
</table>
<div align="right" style="margin-bottom: 5;">[<a href="#__top__">Back to Top</a>]</div>
<a name="idm30"></a><a name="degauss"></a><table width="100%" style="border-color: #b5b500; border-style: solid; border-width: 2; margin-bottom: 10; table-layout: auto; background-color: #FFFFFF;">
<tr>
<th align="left" valign="top" width="20%" style="background: #ffff99; padding: 2 2 2 10; ">degauss</th>
<td style="text-align: left; vertical-align: top; background: #ffffc3; padding: 2 2 2 5; ">REAL</td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
gaussian broadening, Ry (not eV!)
(see below)
</pre></blockquote></td></tr>
</table>
<div align="right" style="margin-bottom: 5;">[<a href="#__top__">Back to Top</a>]</div>
<table width="100%" style="border-color: #b5b500; border-style: solid; border-width: 2; margin-bottom: 10; table-layout: auto; background-color: #FFFFFF;">
<tr>
<th align="left" valign="top" width="20%" style="white-space: nowrap; background: #ffff99; padding: 2 2 2 10; ">
<a name="idm33"></a><a name="Emin"></a>Emin, <a name="idm34"></a><a name="Emax"></a>Emax</th>
<td style="text-align: left; vertical-align: top; background: #ffffc3; padding: 2 2 2 5; ">REAL</td>
</tr>
<tr>
<td style="text-align: right; vertical-align: top; background: #ffffc3; padding: 2 10 2 10; "><i>Default:</i></td>
<td style="text-align: left; vertical-align: top; background: #fff3d9; padding: 2 2 2 5; "> band extrema
</td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
min, max energy (eV) for DOS plot. If unspecified, the
lower and/or upper band value, plus/minus 3 times the
value of the gaussian smearing if present, will be used.
</pre></blockquote></td></tr>
</table>
<div align="right" style="margin-bottom: 5;">[<a href="#__top__">Back to Top</a>]</div>
<a name="idm37"></a><a name="DeltaE"></a><table width="100%" style="border-color: #b5b500; border-style: solid; border-width: 2; margin-bottom: 10; table-layout: auto; background-color: #FFFFFF;">
<tr>
<th align="left" valign="top" width="20%" style="background: #ffff99; padding: 2 2 2 10; ">DeltaE</th>
<td style="text-align: left; vertical-align: top; background: #ffffc3; padding: 2 2 2 5; ">REAL</td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
energy grid step (eV)
</pre></blockquote></td></tr>
</table>
<div align="right" style="margin-bottom: 5;">[<a href="#__top__">Back to Top</a>]</div>
<a name="idm39"></a><a name="fildos"></a><table width="100%" style="border-color: #b5b500; border-style: solid; border-width: 2; margin-bottom: 10; table-layout: auto; background-color: #FFFFFF;">
<tr>
<th align="left" valign="top" width="20%" style="background: #ffff99; padding: 2 2 2 10; ">fildos</th>
<td style="text-align: left; vertical-align: top; background: #ffffc3; padding: 2 2 2 5; ">CHARACTER</td>
</tr>
<tr>
<td style="text-align: right; vertical-align: top; background: #ffffc3; padding: 2 10 2 10; "><i>Default:</i></td>
<td style="text-align: left; vertical-align: top; background: #fff3d9; padding: 2 2 2 5; "> '<a href="#prefix">prefix</a>.dos'
</td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
output file containing DOS(E)
</pre></blockquote></td></tr>
</table>
<div align="right" style="margin-bottom: 5;">[<a href="#__top__">Back to Top</a>]</div>
</td></tr></tbody></table></td></tr>
</table>
<blockquote>
<a name="idm43"><h3>Notes</h3></a>
<blockquote>
<a name="idm44"><h4>Output</h4></a>
<blockquote><pre>
The total DOS (states/eV plotted vs <i>E</i> in eV) is written to file <a href="#fildos">fildos</a>
</pre></blockquote>
</blockquote>
<blockquote>
<a name="idm48"><h4>Important !</h4></a>
<blockquote><pre>
The tetrahedron method is used if
- the input data file has been produced by pw.x using the option
occupations='tetrahedra', AND
- a value for degauss is not given as input to namelist &dos
Gaussian broadening is used in all other cases:
- if <a href="#degauss">degauss</a> is set to some value in namelist &DOS, that value
(and the optional value for <a href="#ngauss">ngauss</a>) is used
- if <a href="#degauss">degauss</a> is NOT set to any value in namelist &DOS, the
value of <a href="#degauss">degauss</a> and of <a href="#ngauss">ngauss</a> are read from the input data
file (they will be the same used in the pw.x calculations)
- if <a href="#degauss">degauss</a> is NOT set to any value in namelist &DOS, AND
there is no value of <a href="#degauss">degauss</a> and of <a href="#ngauss">ngauss</a> in the input data
file, <a href="#degauss">degauss</a>=<a href="#DeltaE">DeltaE</a> (in Ry) and <a href="#ngauss">ngauss</a>=0 will be used
</pre></blockquote>
</blockquote>
</blockquote>
</td></tr>
</table>
<small>
This file has been created by helpdoc utility on Wed Dec 02 08:04:45 CET 2020.
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