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<title>hp.x: input description</title>
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<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:
hp.x / PWscf / Quantum Espresso<span style="font-weight: normal;"> (version: 6.4)</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">&amp;INPUTHP</a></p>
<blockquote>
<a href="#idm9">prefix</a> | <a href="#idm12">outdir</a> | <a href="#idm17">iverbosity</a> | <a href="#idm20">max_seconds</a> | <a href="#idm24">nq1</a> | <a href="#idm25">nq2</a> | <a href="#idm26">nq3</a> | <a href="#idm29">skip_equivalence_q</a> | <a href="#idm32">determine_num_pert_only</a> | <a href="#idm36">find_atpert</a> | <a href="#idm39">docc_thr</a> | <a href="#idm42">skip_type</a> | <a href="#idm46">equiv_type</a> | <a href="#idm50">perturb_only_atom</a> | <a href="#idm54">start_q</a> | <a href="#idm58">last_q</a> | <a href="#idm62">sum_pertq</a> | <a href="#idm66">compute_hp</a> | <a href="#idm70">conv_thr_chi</a> | <a href="#idm73">thresh_init</a> | <a href="#idm76">ethr_nscf</a> | <a href="#idm79">niter_max</a> | <a href="#idm82">alpha_mix(i)</a> | <a href="#idm86">nmix</a>
</blockquote>
</blockquote>
</blockquote>
<blockquote>
<a name="idm3"></a><h3>INTRODUCTION</h3>
<blockquote><pre>
<b>Input data format:</b> { } = optional, [ ] = it depends, # = comment
<b>Structure of the input data:</b>
===============================================================================
<b>&amp;INPUTHP</b>
...
<b>/</b>
</pre></blockquote>
</blockquote>
<a name="idm8"></a><a name="INPUTHP"></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">&amp;</span>INPUTHP</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;">
Prepended to input/output filenames; must be the same
used in the calculation of unperturbed system.
</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;
<br> current directory ('./') otherwise
</td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
Directory containing input, output, and scratch files;
must be the same as specified in the calculation of
the unperturbed system.
</pre></blockquote></td></tr>
</table>
<div align="right" style="margin-bottom: 5;">[<a href="#__top__">Back to Top</a>]</div>
<a name="idm17"></a><a name="iverbosity"></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; ">iverbosity</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; "> 1
</td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
= 1 : minimal output
= 2 : as above + symmetry matrices, final response
matrices chi0 and chi1 and their inverse matrices,
full U matrix
= 3 : as above + various detailed info about the NSCF
calculation at k and k+q
= 4 : as above + response occupation matrices at every
iteration and for every q point in the star
</pre></blockquote></td></tr>
</table>
<div align="right" style="margin-bottom: 5;">[<a href="#__top__">Back to Top</a>]</div>
<a name="idm20"></a><a name="max_seconds"></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; ">max_seconds</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; "> 1.d7
</td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
Maximum allowed run time before the job stops smoothly.
</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="idm24"></a><a name="nq1"></a>nq1, <a name="idm25"></a><a name="nq2"></a>nq2, <a name="idm26"></a><a name="nq3"></a>nq3</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; "> 1,1,1
</td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
Parameters of the Monkhorst-Pack grid (no offset).
Same meaning as for nk1, nk2, nk3 in the input of pw.x.
</pre></blockquote></td></tr>
</table>
<div align="right" style="margin-bottom: 5;">[<a href="#__top__">Back to Top</a>]</div>
<a name="idm29"></a><a name="skip_equivalence_q"></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; ">skip_equivalence_q</th>
<td style="text-align: left; vertical-align: top; background: #ffffc3; padding: 2 2 2 5; ">LOGICAL</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; "> .false.
</td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
If .true. then the HP code will skip the equivalence
analysis of q points, and thus the full grid of q points
will be used. Otherwise the symmetry is used to determine
equivalent q points (star of q), and then perform
calculations only for inequivalent q points.
</pre></blockquote></td></tr>
</table>
<div align="right" style="margin-bottom: 5;">[<a href="#__top__">Back to Top</a>]</div>
<a name="idm32"></a><a name="determine_num_pert_only"></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; ">determine_num_pert_only</th>
<td style="text-align: left; vertical-align: top; background: #ffffc3; padding: 2 2 2 5; ">LOGICAL</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; "> .false.
</td>
</tr>
<tr>
<td style="text-align: right; vertical-align: top; background: #ffffc3; padding: 2 10 2 10; "><i>See:</i></td>
<td style="text-align: left; vertical-align: top; background: #fff3d9; padding: 2 2 2 5; "><a href="#find_atpert">find_atpert</a></td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
If .true. determines the number of perturbations
(i.e. which atoms will be perturbed) and exits smoothly
without performing any calculation.
</pre></blockquote></td></tr>
</table>
<div align="right" style="margin-bottom: 5;">[<a href="#__top__">Back to Top</a>]</div>
<a name="idm36"></a><a name="find_atpert"></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; ">find_atpert</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; "> 1
</td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
Method for searching of atoms which must be perturbed.
1 = Find how many inequivalent Hubbard atoms there are
by analyzing unperturbed occupations.
2 = Find how many Hubbard atoms to perturb based on
how many different Hubbard atomic types there are.
Warning: atoms which have the same type but which
are inequivalent by symmetry or which have different
occupations will not be distinguished in this case
(use option 1 or 3 instead).
3 = Find how many inequivalent Hubbard atoms
there are using symmetry. Atoms which have the
same type but are not equivalent by symmetry will
be distinguished in this case.
</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="docc_thr"></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; ">docc_thr</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; "> 5.D-5
</td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
Threshold for a comparison of unperturbed occupations
which is needed for the selection of atoms which must
be perturbed. Can be used only when find_atpert = 1.
</pre></blockquote></td></tr>
</table>
<div align="right" style="margin-bottom: 5;">[<a href="#__top__">Back to Top</a>]</div>
<a name="idm42"></a><a name="skip_type"></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; ">skip_type</th>
<td style="text-align: left; vertical-align: top; background: #ffffc3; padding: 2 2 2 5; ">LOGICAL</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; "> .false.
</td>
</tr>
<tr>
<td style="text-align: right; vertical-align: top; background: #ffffc3; padding: 2 10 2 10; "><i>See:</i></td>
<td style="text-align: left; vertical-align: top; background: #fff3d9; padding: 2 2 2 5; "><a href="#equiv_type">equiv_type</a></td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
skip_type(i), where i runs over types of atoms.
If skip_type(i)=.true. then no linear-response
calculation will be performed for the i-th atomic type:
in this case equiv_type(i) must be specified, otherwise
the HP code will stop. This option is useful if the
system has atoms of the same type but opposite spin
pollarizations (anti-ferromagnetic case).
This keyword cannot be used when find_atpert = 1.
</pre></blockquote></td></tr>
</table>
<div align="right" style="margin-bottom: 5;">[<a href="#__top__">Back to Top</a>]</div>
<a name="idm46"></a><a name="equiv_type"></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; ">equiv_type</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>See:</i></td>
<td style="text-align: left; vertical-align: top; background: #fff3d9; padding: 2 2 2 5; "><a href="#skip_type">skip_type</a></td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
equiv_type(i), where i runs over types of atoms.
equiv_type(i)=j, will make type i equivalent to type j
(useful when nspin=2). Such a merging of types is done
only at the post-processing stage.
This keyword cannot be used when find_atpert = 1.
</pre></blockquote></td></tr>
</table>
<div align="right" style="margin-bottom: 5;">[<a href="#__top__">Back to Top</a>]</div>
<a name="idm50"></a><a name="perturb_only_atom"></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; ">perturb_only_atom</th>
<td style="text-align: left; vertical-align: top; background: #ffffc3; padding: 2 2 2 5; ">LOGICAL</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; "> .false.
</td>
</tr>
<tr>
<td style="text-align: right; vertical-align: top; background: #ffffc3; padding: 2 10 2 10; "><i>See:</i></td>
<td style="text-align: left; vertical-align: top; background: #fff3d9; padding: 2 2 2 5; "><a href="#compute_hp">compute_hp</a></td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
If perturb_only_atom(i)=.true. then only the i-th
atom will be perturbed and considered in the run.
This variable is useful when one wants to split
the whole calculation on parts. Note: this variable
has a higher priority than skip_type.
</pre></blockquote></td></tr>
</table>
<div align="right" style="margin-bottom: 5;">[<a href="#__top__">Back to Top</a>]</div>
<a name="idm54"></a><a name="start_q"></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; ">start_q</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; "> 1
</td>
</tr>
<tr>
<td style="text-align: right; vertical-align: top; background: #ffffc3; padding: 2 10 2 10; "><i>See:</i></td>
<td style="text-align: left; vertical-align: top; background: #fff3d9; padding: 2 2 2 5; ">
<a href="#last_q">last_q</a>, <a href="#sum_pertq">sum_pertq</a>
</td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
Computes only the q points from start_q to last_q.
IMPORTANT: start_q must be smaller or equal to
the total number of q points found.
</pre></blockquote></td></tr>
</table>
<div align="right" style="margin-bottom: 5;">[<a href="#__top__">Back to Top</a>]</div>
<a name="idm58"></a><a name="last_q"></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; ">last_q</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; "> number of q points
</td>
</tr>
<tr>
<td style="text-align: right; vertical-align: top; background: #ffffc3; padding: 2 10 2 10; "><i>See:</i></td>
<td style="text-align: left; vertical-align: top; background: #fff3d9; padding: 2 2 2 5; ">
<a href="#start_q">start_q</a>, <a href="#sum_pertq">sum_pertq</a>
</td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
Computes only the q points from start_q to last_q.
IMPORTANT: last_q must be smaller or equal to
the total number of q points found.
</pre></blockquote></td></tr>
</table>
<div align="right" style="margin-bottom: 5;">[<a href="#__top__">Back to Top</a>]</div>
<a name="idm62"></a><a name="sum_pertq"></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; ">sum_pertq</th>
<td style="text-align: left; vertical-align: top; background: #ffffc3; padding: 2 2 2 5; ">LOGICAL</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; "> .false.
</td>
</tr>
<tr>
<td style="text-align: right; vertical-align: top; background: #ffffc3; padding: 2 10 2 10; "><i>See:</i></td>
<td style="text-align: left; vertical-align: top; background: #fff3d9; padding: 2 2 2 5; ">
<a href="#start_q">start_q</a>, <a href="#last_q">last_q</a>, <a href="#perturb_only_atom">perturb_only_atom</a>
</td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
If it is set to .true. then the HP code will collect
pieces of the response occupation matrices for all
q points. This variable should be used only when
start_q, last_q and perturb_only_atom are used.
</pre></blockquote></td></tr>
</table>
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<a name="idm66"></a><a name="compute_hp"></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; ">compute_hp</th>
<td style="text-align: left; vertical-align: top; background: #ffffc3; padding: 2 2 2 5; ">LOGICAL</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; "> .false.
</td>
</tr>
<tr>
<td style="text-align: right; vertical-align: top; background: #ffffc3; padding: 2 10 2 10; "><i>See:</i></td>
<td style="text-align: left; vertical-align: top; background: #fff3d9; padding: 2 2 2 5; "><a href="#perturb_only_atom">perturb_only_atom</a></td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
If it is set to .true. then the HP code will collect
pieces of the chi0 and chi matrices (which must have
been produced in previous runs) and then compute
Hubbard parameters. The HP code will look for files
tmp_dir/HP/prefix.chi.i.dat. Note that all files
prefix.chi.i.dat (where i runs over all perturbed
atoms) must be placed in one folder tmp_dir/HP/.
compute_hp=.true. must be used only when the
calculation was parallelized over perturbations.
</pre></blockquote></td></tr>
</table>
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<a name="idm70"></a><a name="conv_thr_chi"></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; ">conv_thr_chi</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; "> 1.D-5
</td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
Convergence threshold for the response function chi,
which is defined as a trace of the response
occupation matrix.
</pre></blockquote></td></tr>
</table>
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<a name="idm73"></a><a name="thresh_init"></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; ">thresh_init</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; "> 1.D-14
</td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
Initial threshold for the solution of the linear
system (first iteration). Needed to converge the
bare (non-interacting) response function chi0.
The specified value will be multiplied by the
number of electrons in the system.
</pre></blockquote></td></tr>
</table>
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<a name="idm76"></a><a name="ethr_nscf"></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; ">ethr_nscf</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; "> 1.D-11
</td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
Threshold for the convergence of eigenvalues during
the iterative diagonalization of the Hamiltonian in
the non-self-consistent-field (NSCF) calculation at
k and k+q points. Note, this quantity is NOT extensive.
</pre></blockquote></td></tr>
</table>
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<a name="idm79"></a><a name="niter_max"></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; ">niter_max</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; "> 100
</td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
Maximum number of iterations in the iterative
solution of the linear-response Kohn-Sham equations.
</pre></blockquote></td></tr>
</table>
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<a name="idm82"></a><a name="alpha_mix"></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; ">alpha_mix(i)</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; "> alpha_mix(1)=0.3
</td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
Mixing parameter (for the i-th iteration) for updating
the response SCF potential using the modified Broyden
method: D.D. Johnson, <a href="https://journals.aps.org/prb/abstract/10.1103/PhysRevB.38.12807">PRB 38, 12807 (1988)</a>.
</pre></blockquote></td></tr>
</table>
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<a name="idm86"></a><a name="nmix"></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; ">nmix</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; "> 4
</td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
Number of iterations used in potential mixing
using the modified Broyden method
D.D. Johnson, <a href="https://journals.aps.org/prb/abstract/10.1103/PhysRevB.38.12807">PRB 38, 12807 (1988)</a>.
</pre></blockquote></td></tr>
</table>
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</td></tr></tbody></table></td></tr>
</table>
</td></tr>
</table>
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