Dear Dr Gerhard Sir,<br><br><div>In this regard I also want to ask one question......</div><div>whether the unoccupied part of DOS can changes with temperature?......when some part of the vacant states will become filled at higher temperature...does the nature of the DOS (above Fermi energy) also gets changed?</div>
<div>OR</div><div>whether the nature of DOS is constant (whether occupied or unoccupied) upon variation of temperature....it only electrons which transfer from the occupied part to the unoccupied part with rise in temperature?</div>
<div><br></div><div>with best regards,<br><div class="gmail_quote">On Sat, Aug 20, 2011 at 2:31 AM, Gerhard Fecher <span dir="ltr"><<a href="mailto:fecher@uni-mainz.de">fecher@uni-mainz.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
as there are occupied states (below eF) and unoccupied states (above eF)<br>
<br>
just remeber basic quantum mechanics and imagine an H atom, you have the occupied 1s and the unoccupied 2s, 2p, 3s, 3p, 3d, and so on<br>
<br>
Ciao<br>
Gerhard<br>
<br>
====================================<br>
Dr. Gerhard H. Fecher<br>
Institut of Inorganic and Analytical Chemistry<br>
Johannes Gutenberg - University<br>
55099 Mainz<br>
________________________________________<br>
Von: <a href="mailto:wien-bounces@zeus.theochem.tuwien.ac.at">wien-bounces@zeus.theochem.tuwien.ac.at</a> [<a href="mailto:wien-bounces@zeus.theochem.tuwien.ac.at">wien-bounces@zeus.theochem.tuwien.ac.at</a>]&quot; im Auftrag von &quot;Jihoon Park [<a href="mailto:jpark61@crimson.ua.edu">jpark61@crimson.ua.edu</a>]<br>
Gesendet: Freitag, 19. August 2011 21:39<br>
Bis: <a href="mailto:wien@zeus.theochem.tuwien.ac.at">wien@zeus.theochem.tuwien.ac.at</a><br>
Betreff: [Wien] A question about density of states (DOS)<br>
<div><div></div><div class="h5"><br>
Dear users,<br>
<br>
<br>
This question is not related to WIEN2k program, but physical concept itself.<br>
As I know, Fermi energy level is the maximum energy that an electron can have at 0 K,<br>
but why we can calculate DOS at the range of energy that exceed the Fermi energy, even thought the calculations are always 0 K calculation?<br>
<br>
<br>
All my best,<br>
Jihoon Park<br>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br>Shamik Chakrabarti<br>Senior Research Fellow<br>Dept. of Physics & Meteorology<br>Material Processing & Solid State Ionics Lab<br>IIT Kharagpur<br>Kharagpur 721302<br>
INDIA<br>
</div>