<DIV><BR>Dear all,</DIV>
<DIV>I have a question about the Eliashberg spectral fuction a2F(w). Both the codes</DIV>
<DIV>lambda.x and matdyn.x can produce a2F(w) and lambda. Because the electron-phonon</DIV>
<DIV>coupling constant lambda can be calculated by the integration of a2F(w) in the</DIV>
<DIV>frequency space. For simplicity, I will only discuss a2F(w). Obviously, the results of</DIV>
<DIV>a2F(w) given by these two codes (lambda.x and matdyn.x) are different.<BR>So which one is more reasonable and why?</DIV>
<DIV> </DIV>
<DIV>In my opinion, the code lambda.x calculates a2F(w) through direct Brillouin-Zone</DIV>
<DIV>summation. While, the code matdyn.x calculates a2F(w) through Fourier interpolation.</DIV>
<DIV>So the quanlity of a2F(w) given by matdyn.x strongly depends on the precision of</DIV>
<DIV>Fourier interpolation. And the a2F(w) generated by lambda.x is more reasonable.<BR>Am I right?</DIV>
<DIV> </DIV>
<DIV>Any help will be highly appreciated!</DIV>
<DIV> </DIV>
<DIV>Best wishes</DIV>
<DIV> </DIV>
<DIV>Miao Gao<BR>-----------------------------------------------------------------------------<BR>Postdoctor at Institute of Physics, Chinese Academy and Science.<BR>-----------------------------------------------------------------------------<BR></DIV><BR><br>