<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><P class=MsoNormal style="MARGIN: 0cm 0cm 10pt"><SPAN lang=EN-US style="FONT-SIZE: 12pt; LINE-HEIGHT: 115%; FONT-FAMILY: 'Times New Roman','serif'; mso-ascii-theme-font: major-bidi; mso-hansi-theme-font: major-bidi; mso-bidi-theme-font: major-bidi; mso-ansi-language: EN-US">Dear all,<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></DIV>
<P class=MsoNormal style="MARGIN: 0cm 0cm 10pt"><SPAN lang=EN-US style="FONT-SIZE: 12pt; LINE-HEIGHT: 115%; FONT-FAMILY: 'Times New Roman','serif'; mso-ascii-theme-font: major-bidi; mso-hansi-theme-font: major-bidi; mso-bidi-theme-font: major-bidi; mso-ansi-language: EN-US">I perfomed a calculation on <SPAN style="mso-spacerun: yes"> </SPAN>TlAs, the electronic band shows a semi-metallic behavior, and I want to calculate the phonons dispersion, in this case, we <SPAN style="mso-spacerun: yes"> </SPAN>use the metallic option in the scf input<SPAN style="mso-spacerun: yes"> </SPAN>or we consider this compound as semiconductor in order to have the dynamical properties (Born effective <SPAN style="mso-spacerun: yes"> </SPAN>charge and the dielectric tensor)?<o:p></o:p></SPAN></DIV>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal; tab-stops: 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'; mso-ascii-theme-font: major-bidi; mso-hansi-theme-font: major-bidi; mso-bidi-theme-font: major-bidi; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: FR">Thanks you in advance.<o:p></o:p></SPAN></DIV>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal; tab-stops: 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'; mso-ascii-theme-font: major-bidi; mso-hansi-theme-font: major-bidi; mso-bidi-theme-font: major-bidi; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: FR"><o:p> </o:p></SPAN></DIV>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal; tab-stops: 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'; mso-ascii-theme-font: major-bidi; mso-hansi-theme-font: major-bidi; mso-bidi-theme-font: major-bidi; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: FR"><o:p> </o:p></SPAN></DIV><SPAN style="FONT-SIZE: 11pt; LINE-HEIGHT: 115%; FONT-FAMILY: 'Calibri','sans-serif'; mso-ascii-theme-font: minor-latin; mso-hansi-theme-font: minor-latin; mso-bidi-theme-font: minor-bidi; mso-ansi-language: FR; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin; mso-bidi-font-family: Arial; mso-fareast-language: EN-US; mso-bidi-language: AR-SA">Moulay Mazouz<BR>Département de Physique<BR>Université des Sciences et de la Technologie d'Oran. <BR>USTO.
Oran. Algérie</SPAN></td></tr></table><br>