<PRE><SPAN lang=EN-US style="COLOR: red; FONT-FAMILY: 'Times New Roman'"><FONT size=3><FONT color=#000000>Dear Stefano de Gironcoli</FONT></FONT></SPAN></PRE><PRE><SPAN lang=EN-US style="COLOR: red; FONT-FAMILY: 'Times New Roman'"><FONT size=3><FONT color=#000000></FONT></FONT></SPAN></PRE><PRE><SPAN lang=EN-US style="COLOR: red; FONT-FAMILY: 'Times New Roman'"><FONT size=3><FONT color=#000000> Recently, i am testing the virtual-atom pseudopotential generated by virtual.x.</FONT></FONT></SPAN></PRE><PRE><SPAN lang=EN-US style="COLOR: red; FONT-FAMILY: 'Times New Roman'"><FONT size=3><FONT color=#000000>I want to ask if the testing results of the virtual pseudo made by 0% pseudo1 + 100% pseudo2</FONT></FONT></SPAN></PRE><PRE><SPAN lang=EN-US style="COLOR: red; FONT-FAMILY: 'Times New Roman'"><FONT size=3><FONT color=#000000>are in same agreement with the results calculated directly with pseudo2. If both </FONT></FONT></SPAN></PRE><PRE><SPAN lang=EN-US style="COLOR: red;
FONT-FAMILY: 'Times New Roman'"><FONT size=3><FONT color=#000000>values are different, only the convergence trend is equal. Is the virtual-pseudo OK? </FONT></FONT></SPAN></PRE><PRE><SPAN lang=EN-US style="COLOR: red; FONT-FAMILY: 'Times New Roman'"><FONT size=3><FONT color=#000000>While i want to </FONT></FONT></SPAN><SPAN lang=EN-US style="COLOR: red; FONT-FAMILY: 'Times New Roman'"><FONT size=3><FONT color=#000000>calculate phonon frequencies, </FONT></FONT></SPAN><SPAN lang=EN-US style="COLOR: red; FONT-FAMILY: 'Times New Roman'"><FONT size=3><FONT color=#000000>how can I do to obtain the mass </FONT></FONT></SPAN></PRE><PRE><SPAN lang=EN-US style="COLOR: red; FONT-FAMILY: 'Times New Roman'"><FONT size=3><FONT color=#000000>of virtual-atom pseudopotential. Because of </FONT></FONT></SPAN><SPAN lang=EN-US style="COLOR: red; FONT-FAMILY: 'Times New Roman'"><FONT size=3><FONT color=#000000>the mixing pseudopotential as (1-x) </FONT></FONT></SPAN></PRE><PRE><SPAN
lang=EN-US style="COLOR: red; FONT-FAMILY: 'Times New Roman'"><FONT size=3><FONT color=#000000>pseudopotential1 + x pseudopotential2, </FONT></FONT></SPAN><SPAN lang=EN-US style="COLOR: red; FONT-FAMILY: 'Times New Roman'"><FONT size=3><FONT color=#000000>whether the mass of virtual-atom </FONT></FONT></SPAN></PRE><PRE><SPAN lang=EN-US style="COLOR: red; FONT-FAMILY: 'Times New Roman'"><FONT size=3><FONT color=#000000>pseudopotential can be determined by (1-x)</FONT></FONT></SPAN><SPAN lang=EN-US style="COLOR: red; FONT-FAMILY: 'Times New Roman'"><FONT size=3><FONT color=#000000> mass of potential1 + x mass of potential2.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></FONT></FONT></SPAN></PRE><PRE style="TEXT-INDENT: 12pt"><SPAN lang=EN-US style="COLOR: red; FONT-FAMILY: 'Times New Roman'"><FONT size=3><FONT color=#000000>Thank you for your advice.<o:p></o:p></FONT></FONT></SPAN></PRE><PRE style="TEXT-INDENT: 12pt"><SPAN lang=EN-US
style="COLOR: red; FONT-FAMILY: 'Times New Roman'"><FONT size=3><FONT color=#000000>Best regards<o:p></o:p></FONT></FONT></SPAN></PRE><PRE style="TEXT-INDENT: 12pt"><SPAN lang=EN-US style="COLOR: red; FONT-FAMILY: 'Times New Roman'"><FONT size=3><FONT color=#000000>Junjie Wang<o:p></o:p></FONT></FONT></SPAN></PRE><p>
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