<div class="gmail_quote">
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid"><br> Dear Prof.</blockquote>
<div> I have encontered a problems in calculation of Raman and IR spectroscopy ,using ph.x</div>
<div> the crystal is metallic, so it can not be done , </div>
<div> 1 Why the IR or Raman calcualtion should only limited to the insulating system .</div>
<div> 2 How should I do if the system is metallic.</div></div><br><br clear="all"><br>-- <br>Sincerely Y. M. Qian <br>Lab.of Condensed Matter Theory and Materials Computation <br>Institute of Physics <br>Chinese Academy of Sciences<br>
Tel: + 8610 8264 9147<br><a href="mailto:E-Mail%3Ayuminqian@gmail.com">E-Mail:yuminqian@gmail.com</a> <br>P.O.Box 603 Beijing 100190<br>China <br><br>