<div dir="ltr"><font size="4">Dear <span style="color:rgb(77,77,77);font-family:Arial,Helvetica,sans-serif;line-height:20px">developers,</span></font><div><font size="4"><span style="color:rgb(77,77,77);font-family:Arial,Helvetica,sans-serif;line-height:20px"><br>
</span></font></div><div style><font color="#4d4d4d" face="Arial, Helvetica, sans-serif" size="4"><span style="line-height:20px">From the dynmat.f90, it seems to use the Raman activity formula (equation 6) in PRB, 54 (1996) 7830. I have two question:</span></font></div>
<div style><font color="#4d4d4d" face="Arial, Helvetica, sans-serif" size="4"><span style="line-height:20px">First, whether the formula keep same if we change the polarization direction of incident beam.</span></font></div>
<div style><font color="#4d4d4d" face="Arial, Helvetica, sans-serif" size="4"><span style="line-height:20px">Second, does this formula is suitable for the two dimensional materials? And if not, what kind of formula might reasonable?</span></font></div>
<div style><font color="#4d4d4d" face="Arial, Helvetica, sans-serif" size="4"><span style="line-height:20px"><br></span></font></div><div style><font color="#4d4d4d" face="Arial, Helvetica, sans-serif" size="4"><span style="line-height:20px"><br>
</span></font></div><div style><font color="#4d4d4d" face="Arial, Helvetica, sans-serif" size="4"><span style="line-height:20px">I am appreciated that if you could answer my questions. </span></font></div><div style><font color="#4d4d4d" face="Arial, Helvetica, sans-serif" size="4"><span style="line-height:20px"><br>
</span></font></div><div style><font color="#4d4d4d" face="Arial, Helvetica, sans-serif" size="4"><span style="line-height:20px">Best wishes,</span></font></div><div style><font color="#4d4d4d" face="Arial, Helvetica, sans-serif" size="4"><span style="line-height:20px">Ruixiang Fei</span></font></div>
<div style><br></div></div>