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<DIV><FONT face=Arial size=2><FONT face="Times New Roman" size=3><FONT
face=Arial size=2>Les recordamos el Coloquio de hoy <STRONG>A LAS 11
HS</STRONG></FONT></FONT></FONT></DIV>
<DIV><FONT face=Arial size=2><FONT face="Times New Roman" size=3>
</FONT></FONT></DIV>
<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<BR><BR> <STRONG>Hoy</STRONG> <STRONG>MARTES</STRONG> 5
de mayo a las <STRONG>11 hs</STRONG></FONT></DIV>
<DIV> </DIV><FONT face=Arial size=2>
<DIV>
<P class=MsoBodyText style="MARGIN: 0cm 0cm 0pt"><SPAN lang=IT><FONT
face="Times New Roman" size=5><STRONG>Transporte electrónico a través de anillos
nanoscópicos<BR>interactuantes: efecto de la separación de carga y
espín</STRONG><BR></FONT></SPAN></P>
<P class=MsoBodyText style="MARGIN: 0cm 0cm 0pt"><SPAN lang=IT><STRONG><FONT
face="Times New Roman" size=5></FONT></STRONG></SPAN> </P>
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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
face="Times New Roman"> <FONT
size=5> Karen
Hallberg</FONT></FONT></SPAN></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=ES-AR><FONT
face="Times New Roman" size=4><SPAN
style="mso-spacerun: yes"></SPAN></FONT></SPAN> </P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=ES-AR><FONT
face="Times New Roman" size=4><SPAN
style="mso-spacerun: yes">
CAB, Instituo Balseiro, Bariloche</SPAN></FONT></SPAN></P>
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face="Times New Roman" size=3><SPAN
style="mso-spacerun: yes"> </SPAN></FONT></SPAN></P>
<DIV><SPAN lang=ES-AR><SPAN style="mso-spacerun: yes"><FONT
face="Times New Roman" size=3>La separación de los grados de libertad de carga y
espín fue predicha en forma teórica en sistemas unidimensionales
fuertemente<BR>interactuantes (líquidos de Luttinger) y observado en forma
indirecta en varios materiales formados por cadenas de
electrones<BR>correlacionados. Voy a presentar resultados de propiedades de
transporte a través de anillos interactuantes de Bohm-Aharonov (atravesados por
un campo magnético), con uno o dos canales (anillos o escaleras). Para ciertos
valores de flujo magnético observamos depresiones (dips) marcadas en la
conductancia que son una consecuencia de dicha separación. Los flujos para los
que aparecen estos dips dependen de las velocidades relativas de carga y de
espín. Estos resultados abren la posibilidad </FONT></SPAN></SPAN><SPAN
lang=ES-AR><SPAN style="mso-spacerun: yes"><FONT face="Times New Roman"
size=3>de observar en forma directa este fenómeno de muchos cuerpos en
verdaderos dispositivos nanoscópicos.</FONT></SPAN></SPAN></DIV>
<DIV><SPAN lang=ES-AR><FONT size=3><SPAN style="mso-spacerun: yes"><FONT
face="Times New Roman" size=4><BR></FONT></SPAN></FONT></SPAN><SPAN
lang=ES-AR><FONT face="Times New Roman" size=4><SPAN
style="mso-spacerun: yes">-----------------------------------------------------------------------</SPAN></FONT></SPAN></DIV>
<DIV><SPAN lang=ES-AR><FONT face="Times New Roman" size=4><SPAN
style="mso-spacerun: yes">Los
esperamos!</SPAN></FONT></SPAN></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></DIV></FONT></FONT></DIV></BODY></HTML>