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<DIV><FONT face=Arial size=2><FONT face="Times New Roman"
size=3> COLOQUIOS
DEL DEPARTAMENTO DE
FÍSICA<BR>
FCEyN -
UBA<BR><BR>
Charla, café
y galletitas<BR> En
el Aula Federman, 1er piso Pabellón
I.<BR>
Ciudad Universitaria</FONT>
<DIV> </DIV>
<DIV><FONT face=Arial size=2><FONT face="Times New Roman"
size=3>
El próximo jueves 10 de julio a las 14 hs<FONT face=Arial size=2>
</FONT></FONT></FONT></DIV>
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<P class=MsoBodyText style="MARGIN: 0cm 0cm 0pt"><SPAN lang=IT><STRONG><FONT
face=Arial size=5>Transiciones de fase ultrarrápidas inducidas
</FONT></STRONG></SPAN></P>
<P class=MsoBodyText style="MARGIN: 0cm 0cm 0pt"><SPAN lang=IT><STRONG><FONT
face=Arial
size=5> por
pulsos láser ultracortos</FONT></STRONG></SPAN></P>
<P class=MsoBodyText style="MARGIN: 0cm 0cm 0pt"><SPAN lang=IT><STRONG><FONT
face=Arial
size=5></FONT></STRONG></SPAN> </P></FONT></SPAN></SPAN></FONT></SPAN></SPAN></SPAN></SPAN></FONT></SPAN></SPAN></SPAN></FONT></SPAN></SPAN></SPAN></SPAN></FONT></SPAN></SPAN></SPAN></FONT></SPAN></SPAN></SPAN></SPAN></FONT></SPAN></SPAN></SPAN>
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<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=ES-AR><FONT
size=3><SPAN
style="mso-spacerun: yes"> <FONT
size=5> Martín E.
García</FONT></SPAN></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=ES-AR></SPAN> </P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=ES-AR><FONT
size=4><SPAN style="mso-spacerun: yes"><I><SPAN lang=EN-GB
style="FONT-SIZE: 12pt; mso-ansi-language: EN-GB; mso-fareast-font-family: 'MS Mincho'"><FONT
face=Arial>Theoretical Physics, FB 18 and Center for Interdisciplinary
Nanostructure </FONT></SPAN></I></SPAN></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=ES-AR><FONT
size=4><SPAN style="mso-spacerun: yes"><I><SPAN lang=EN-GB
style="FONT-SIZE: 12pt; mso-ansi-language: EN-GB; mso-fareast-font-family: 'MS Mincho'"><FONT
face=Arial> Science
and Technology, Universität Kassel, Germany.<?xml:namespace prefix = o ns =
"urn:schemas-microsoft-com:office:office" /><o:p></o:p></FONT></SPAN></I></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"></SPAN><FONT face=Arial
size=2></FONT><BR></P><o:p></o:p></FONT></SPAN>
<DIV></FONT></SPAN></FONT></SPAN></SPAN></SPAN></FONT></SPAN></SPAN></SPAN></FONT></SPAN></FONT></SPAN></SPAN></SPAN></FONT></SPAN></SPAN></SPAN></FONT></SPAN></FONT></SPAN></SPAN></SPAN></FONT></SPAN></SPAN></SPAN><FONT
face=Arial size=2><FONT face=Arial size=2><FONT face=Arial size=2><SPAN
lang=EN-GB
style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: Verdana; mso-bidi-font-size: 10.0pt; mso-ansi-language: EN-GB; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA; mso-bidi-font-family: Arial"><FONT
face="Times New Roman"
size=3> </FONT></SPAN><FONT
face=Arial size=2><SPAN lang=ES-AR style="mso-ansi-language: ES-AR"><FONT
face="Times New Roman"
size=3>
</FONT></SPAN></DIV>
<DIV>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=ES-AR
style="mso-ansi-language: ES-AR"></SPAN>-----------------------------------------------------------------------------------------------------------------------------------------------</P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><BR> </P></DIV>
<DIV><FONT face="Times New Roman" size=3>RESUMEN:</FONT></DIV>
<DIV><SPAN style="mso-ansi-language: ES"><O:P><FONT face="Times New Roman"
size=3> </FONT></O:P></SPAN></DIV>
<DIV align=justify><SPAN style="mso-ansi-language: ES"><O:P></O:P></SPAN><SPAN
style="mso-ansi-language: ES"><O:P><SPAN
style="FONT-SIZE: 16pt; mso-bidi-font-size: 12.0pt"><SPAN
style="FONT-SIZE: 16pt; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 18pt; mso-bidi-font-size: 12.0pt"><FONT
face="Times New Roman"><SPAN class=MquinadeescribirHTML2><SPAN lang=ES-AR
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><FONT face="Times New Roman"><FONT
face="Century Gothic" color=black><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Century Gothic'"><FONT
face="Times New Roman"><SPAN
style="FONT-SIZE: 16pt; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA"><FONT
size=3><SPAN
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size=3><SPAN lang=ES-AR style="mso-ansi-language: ES-AR"><SPAN lang=ES-AR
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; mso-ansi-language: ES-AR; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
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style="FONT-SIZE: 16pt; mso-bidi-font-size: 12.0pt"><FONT size=3><SPAN
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face="Times New Roman"><SPAN
style="FONT-SIZE: 16pt; mso-bidi-font-size: 12.0pt"><SPAN
style="FONT-SIZE: 16pt; mso-bidi-font-size: 12.0pt"><FONT size=3><SPAN
style="FONT-SIZE: 20pt; mso-bidi-font-size: 12.0pt"><SPAN lang=ES-AR><SPAN
style="mso-ansi-language: ES"><SPAN lang=ES-AR
style="FONT-SIZE: 15pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-ansi-language: ES-AR; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA; mso-bidi-font-family: Times-Roman"><FONT
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<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=FR
style="FONT-SIZE: 12pt; mso-ansi-language: FR; mso-fareast-font-family: 'MS Mincho'">Pulsos
de láser muy intensos y muy cortos producen en materiales una situación de no
equilibrio extremo en la cual los electrones adquieren una temperatura mayor que
la de la superficie del sol mientras que los iones se encuentran a temperatura
ambiente. Bajo esas condiciones, diferentes transiciones de fase estructurales
tienen lugar. Estas se diferencian dramáticamente de las transiciones de fases
conocidas en equilibrio </SPAN><SPAN lang=IT
style="FONT-SIZE: 12pt; mso-ansi-language: IT; mso-fareast-font-family: 'MS Mincho'">termodinamico.
</SPAN><SPAN lang=IT
style="FONT-SIZE: 12pt; mso-ansi-language: IT; mso-fareast-font-family: 'MS Mincho'">En
esta charla presentare un análisis teorico de distintas </SPAN><SPAN lang=DE
style="FONT-SIZE: 12pt; mso-fareast-font-family: 'MS Mincho'">transformaciones
estructurales inducidas por pulsos láser de femtosegundos, como: </SPAN><SPAN
lang=DE
style="FONT-SIZE: 12pt; mso-fareast-font-family: 'MS Mincho'">grafitización de
diamante, ablación de grafito, fusión de </SPAN><SPAN lang=DE
style="FONT-SIZE: 12pt; mso-fareast-font-family: 'MS Mincho'">semiconductores y
manipulación ultrarrápida de nanotubos. </SPAN><SPAN lang=FR
style="FONT-SIZE: 12pt; mso-ansi-language: FR; mso-fareast-font-family: 'MS Mincho'">Nuestros
metodos de estudio se basan en simulaciones de dinámica molecular sobre
superficies de potencial dependientes del tiempo (basadas en Hamiltonianos
electronicos modelo), y en cálculos de superficies de potencial basados en la
teoría del funcional de la densidad y considerando todos los electrones del
sistema.<o:p></o:p></SPAN></P>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt"><SPAN lang=FR
style="mso-ansi-language: FR; mso-fareast-font-family: 'MS Mincho'"><FONT
size=2><FONT face="Courier New"> <o:p></o:p></FONT></FONT></SPAN></P>
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style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: justify"></FONT></P></FONT></SPAN></SPAN>
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size=3></FONT></SPAN></FONT></SPAN></SPAN></FONT></SPAN></SPAN></FONT></SPAN></FONT></SPAN></SPAN></SPAN></FONT></SPAN></FONT></SPAN></FONT></SPAN></FONT></FONT></SPAN></SPAN></FONT></SPAN></SPAN></SPAN></O:P></SPAN><SPAN
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style="FONT-SIZE: 20pt; mso-bidi-font-size: 12.0pt"><FONT size=3><FONT
face=Arial
size=2>-----------------------------------------------------------------------------------------------------------------------------------------</FONT>
</FONT></SPAN></FONT></SPAN></SPAN></FONT></SPAN></SPAN></FONT></SPAN></FONT></SPAN></SPAN></SPAN></FONT></SPAN></FONT></SPAN></FONT></SPAN></FONT></FONT></SPAN></SPAN></FONT></SPAN></SPAN></SPAN></O:P></SPAN></P>
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face="Times New Roman"><SPAN
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style="FONT-SIZE: 16pt; mso-bidi-font-size: 12.0pt"><FONT size=3><SPAN
style="FONT-SIZE: 20pt; mso-bidi-font-size: 12.0pt"></SPAN></FONT></SPAN></SPAN></FONT></SPAN></SPAN></FONT></SPAN></FONT></SPAN></SPAN></SPAN></FONT></SPAN></FONT></SPAN></FONT></SPAN></FONT></FONT></SPAN></SPAN></FONT></SPAN></SPAN></SPAN></O:P></SPAN> </P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: justify"><SPAN
style="mso-ansi-language: ES"><O:P><SPAN
style="FONT-SIZE: 16pt; mso-bidi-font-size: 12.0pt"><SPAN
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face="Times New Roman"><SPAN
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lang=ES-AR
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style="FONT-SIZE: 20pt; mso-bidi-font-size: 12.0pt"><FONT face=Arial
size=2>Estan todos
invitados!</FONT></SPAN></P></DIV></FONT></SPAN></SPAN></FONT></SPAN></SPAN></FONT></SPAN></FONT></SPAN></SPAN></SPAN></FONT></SPAN></FONT></SPAN></FONT></SPAN></FONT></FONT></SPAN></SPAN></FONT></SPAN></SPAN></SPAN></O:P></SPAN></FONT></FONT></FONT></FONT></FONT></DIV></BODY></HTML>