[Pw_forum] A soft phonon at Gamma point

[Lijun Zhang]

Dear all, 
  I am doing some calculations on pressure-induced phase transitions. 
  With increasing pressures, It is found that a mode softens exactly at Gamma
  point.(higher pressure, more negative value) Does it represent a phonon instability or an elastic instability?  
  Thank you in advance.
   
  Lijun Zhang
   

__________________________________________________
赶快注册雅虎超大容量免费邮箱?
http://cn.mail.yahoo.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: /pipermail/attachments/20060205/7b82e295/attachment.htm