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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Dear all,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I am new to work on the LDA+U calculations. Can you please tell me from where I can get the response matrix code. In Quantum Espresso code, I couln’t find the file or the binary. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Furthermore, do we have to apply the perturbation on each atom singly and then see the response of other atoms.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks and regards.<o:p></o:p></p><p class=MsoNormal>Pankaj<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><b><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#0033CC'>Pankaj Kumar<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#0033CC'>Ph. D. Scholar<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#0033CC'>School of Basic Sciences<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#0033CC'>IIT Mandi<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#0033CC'>Mob. 91-9736322824<o:p></o:p></span></b></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>