<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css" style="display:none;"><!-- P {margin-top:0;margin-bottom:0;} --></style>
</head>
<body dir="ltr">
<div id="divtagdefaultwrapper" style="font-size:12pt;color:#000000;font-family:Calibri,Helvetica,sans-serif;" dir="ltr">
<p style="margin-top:0;margin-bottom:0">Hello everyone,</p>
<p style="margin-top:0;margin-bottom:0"><br>
</p>
<p style="margin-top:0;margin-bottom:0">I am doing core-hole calculations to get the DOS for hematite and I am removing a core electron from case.in. I know that I have to add this electron to either the valence states in case.in2 or the background charge in
case.inm, but I don't understand what is called background charge. The UG reads that bgch is the background charge to apply to the cell. What is the nature (physical meaning) of this charge? As I understand, the only charge in a cell is due to nuclei and electrons,
but materials are neutral.. Thanks</p>
<p style="margin-top:0;margin-bottom:0"><br>
</p>
<p style="margin-top:0;margin-bottom:0">Regards</p>
<p style="margin-top:0;margin-bottom:0"><br>
</p>
<div id="Signature">
<div id="divtagdefaultwrapper" style="font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); font-family: Calibri, Arial, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols;">
<div style="font-family:Tahoma; font-size:13px">
<div>
<div><font size="2">Israel Pérez</font>
<div><br>
</div>
<div>
<div>
<div>
<p class="MsoNormal" style="text-align:justify"><font size="2"></font></p>
</div>
</div>
<div style="font-size:13px; font-family:Tahoma"></div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>