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<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>Dear Peter:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'> Thank you very much for reply. I
knew the difference between JDOS and the one with momentum matrix elements. But
what is the difference between the one with momentum matrix elements and
imaginary epsilon with SWITCH 4? I have checked them, the shape of them is
similar, but the values are different. According to definition of epsilon2, can
I say that the one with momentum matrix elements is the only integration part
over BZ, not the sum over all possible transition which is epsilon2, am I
right?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'> Thank you very much<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>Best regards<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Century><span lang=EN-US style='font-size:
10.5pt'>Hao<o:p></o:p></span></font></p>
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