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<P style="TEXT-ALIGN: center; LINE-HEIGHT: normal; MARGIN: 3pt 0cm"
class=MsoNormal align=center><B style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: 'Trajan Pro'; FONT-SIZE: 12pt">Institut za fiziku,
Bijenička cesta 46,<o:p></o:p></SPAN></B></P>
<P style="TEXT-ALIGN: center; LINE-HEIGHT: normal; MARGIN: 3pt 0cm"
class=MsoNormal align=center><B style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: 'Trajan Pro'; FONT-SIZE: 12pt">predavaonica u zgradi
Mladen Paić<o:p></o:p></SPAN></B></P>
<P style="TEXT-ALIGN: center; LINE-HEIGHT: normal; MARGIN: 3pt 0cm"
class=MsoNormal align=center><B style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: 'Trajan Pro'; FONT-SIZE: 14pt"><FONT size=3>četvrtak,
4. studenog 2010, u 15:00 sati<o:p></o:p></FONT></SPAN></B></P>
<P style="TEXT-ALIGN: center; LINE-HEIGHT: normal; MARGIN: 3pt 0cm"
class=MsoNormal align=center><SPAN
style="FONT-FAMILY: 'Trajan Pro'; FONT-SIZE: 8pt"><o:p><FONT
size=3> </FONT></o:p></SPAN></P></TD></TR>
<TR style="mso-yfti-irow: 1">
<TD
style="BORDER-BOTTOM: #ece9d8; BORDER-LEFT: #ece9d8; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 464.4pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; BORDER-RIGHT: #ece9d8; PADDING-TOP: 0cm"
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<P style="TEXT-ALIGN: center; LINE-HEIGHT: 50%; MARGIN: 12pt 0cm 6pt"
class=MsoNormal align=center><B><SPAN
style="LINE-HEIGHT: 50%; FONT-FAMILY: 'Trajan Pro'; FONT-SIZE: 14pt; mso-ansi-language: DE"
lang=DE><FONT size=3>Graphene and Topological
Insulators<o:p></o:p></FONT></SPAN></B></P>
<P style="LINE-HEIGHT: 50%; MARGIN: 12pt 0cm 6pt" class=MsoNormal><B
style="mso-bidi-font-weight: normal"><SPAN
style="LINE-HEIGHT: 50%; FONT-FAMILY: 'Trajan Pro'; FONT-SIZE: 8pt"><o:p><FONT
size=3> </FONT></o:p></SPAN></B></P></TD></TR>
<TR style="mso-yfti-irow: 2">
<TD
style="BORDER-BOTTOM: #ece9d8; BORDER-LEFT: #ece9d8; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 464.4pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; BORDER-RIGHT: #ece9d8; PADDING-TOP: 0cm"
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<P style="TEXT-ALIGN: center; LINE-HEIGHT: normal; MARGIN: 6pt 0cm"
class=MsoNormal align=center><FONT size=3><B
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: 'Trajan Pro'; FONT-SIZE: 14pt; mso-ansi-language: DE"
lang=DE>Dr. Carsten Busse</SPAN></B><B
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: 'Trajan Pro'; FONT-SIZE: 14pt"><o:p></o:p></SPAN></B></FONT></P></TD></TR>
<TR style="mso-yfti-irow: 3">
<TD
style="BORDER-BOTTOM: #ece9d8; BORDER-LEFT: #ece9d8; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 464.4pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; BORDER-RIGHT: #ece9d8; PADDING-TOP: 0cm"
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<P style="TEXT-ALIGN: center; LINE-HEIGHT: normal; MARGIN: 0cm 0cm 0pt"
class=MsoNormal align=center><STRONG><SPAN
style="FONT-FAMILY: 'Trajan Pro'; COLOR: black; FONT-SIZE: 8pt"><o:p><FONT
size=3> </FONT></o:p></SPAN></STRONG></P>
<P style="TEXT-ALIGN: center; LINE-HEIGHT: normal; MARGIN: 0cm 0cm 0pt"
class=MsoNormal align=center><B style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: 'Trajan Pro'; FONT-SIZE: 12pt; mso-ansi-language: DE"
lang=DE>II. Physikalisches Institut, Universität zu
Köln,<o:p></o:p></SPAN></B></P>
<P style="TEXT-ALIGN: center; LINE-HEIGHT: normal; MARGIN: 0cm 0cm 0pt"
class=MsoNormal align=center><B style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: 'Trajan Pro'; FONT-SIZE: 12pt; mso-ansi-language: DE"
lang=DE>Zülpicher Str.77, 50937 Köln, Germany<o:p></o:p></SPAN></B></P>
<P style="TEXT-ALIGN: center; LINE-HEIGHT: normal; MARGIN: 0cm 0cm 0pt"
class=MsoNormal align=center><B style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: 'Trajan Pro'; FONT-SIZE: 8pt; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: FR-CH"><o:p><FONT
size=3> </FONT></o:p></SPAN></B></P>
<P style="TEXT-ALIGN: center; LINE-HEIGHT: normal; MARGIN: 6pt 0cm"
class=MsoNormal align=center><B style="mso-bidi-font-weight: normal"><I
style="mso-bidi-font-style: normal"><SPAN
style="FONT-FAMILY: 'Trajan Pro'; FONT-SIZE: 12pt">E-mail: <A
href="mailto:busse@ph2.uni-koeln.de">busse@ph2.uni-koeln.de</A><o:p></o:p></SPAN></I></B></P>
<P style="TEXT-ALIGN: center; LINE-HEIGHT: normal; MARGIN: 6pt 0cm"
class=MsoNormal align=center><SPAN
style="FONT-FAMILY: Verdana; FONT-SIZE: 8pt"><o:p><FONT
size=3> </FONT></o:p></SPAN></P></TD></TR>
<TR style="mso-yfti-irow: 4">
<TD
style="BORDER-BOTTOM: #ece9d8; BORDER-LEFT: #ece9d8; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 464.4pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; BORDER-RIGHT: #ece9d8; PADDING-TOP: 0cm"
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<P style="TEXT-ALIGN: justify; MARGIN: 0cm 0cm 0pt" class=KeinLeerraum><B
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt; mso-ansi-language: EN-US"
lang=EN-US><FONT size=3>The scanning tunneling microscope (STM) is a
powerful tool to study not only the geometric, but also the electronic
structure of surfaces in atomic resolution. In this talk I will address
the application of STM to two fascinating systems that have stimulated
intense research in the last years, namely graphene and topological
insulators.<o:p></o:p></FONT></SPAN></B></P>
<P style="TEXT-ALIGN: justify; MARGIN: 0cm 0cm 0pt" class=KeinLeerraum><B
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt; mso-ansi-language: EN-US"
lang=EN-US><FONT size=3>The new material graphene (Noble Prize in Physics
2010) currently receives an enormous attention for its exciting properties
[1], caused by its monoatomic thickness and the unique band structure
arising from its lattice symmetry. Here, we study the epitaxial growth of
graphene on Ir(111), which leads to graphene of high structural quality
which is only weakly bonded to the substrate [2-4]. Complementing STM, we
determined key structural parameters using an x-ray standing wave (XSW)
analysis. The results are corroborated by extensive DFT-calculations
incorporating nonlocal interactions. Furthermore, graphene on Ir(111) is a
template for the growth of metal cluster lattices (Ir, Pt, W, Re, Au, Fe)
[5,6] showing a narrow size distribution and exceptional thermal
stability.</FONT><A name=sectionHeads1></A><A name=text></A><A
name=tableCaptions></A><o:p></o:p></SPAN></B></P>
<P style="TEXT-ALIGN: justify; MARGIN: 0cm 0cm 0pt" class=KeinLeerraum><B
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt; mso-ansi-language: EN-US"
lang=EN-US><FONT size=3>Topological insulators (TI) represent a new class
of materials showing a bulk gap like an ordinary insulator but conducting
states on their surface. These surface states are topologically protected
against perturbations and impurity scattering by time-reversal invariance
(TRI) [7]. Here, we study the Te-terminated (111) surface of
Bi<SUB>2</SUB>Te<SUB>3</SUB>, a second generation 3D topological
insulator. We investigated the surface state by analyzing interference
patterns which are generated by electrons scattering at defects on the
surface.<o:p></o:p></FONT></SPAN></B></P><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 8pt" lang=DE><o:p><FONT size=1>
<P style="MARGIN: 0cm 0cm 0pt" class=KeinLeerraum></FONT></o:p></SPAN></P>
<P style="TEXT-ALIGN: justify; LINE-HEIGHT: 150%; MARGIN: 0cm 0cm 10pt"
class=MsoNormal><B style="mso-bidi-font-weight: normal"><SPAN
style="LINE-HEIGHT: 150%; FONT-FAMILY: 'Trajan Pro'; FONT-SIZE: 12pt; mso-bidi-font-family: Arial"></SPAN></B> </P><SPAN
style="LINE-HEIGHT: 150%; FONT-FAMILY: 'Trajan Pro'; FONT-SIZE: 12pt; mso-bidi-font-family: Arial">
<P style="MARGIN: 0cm 0cm 0pt" class=KeinLeerraum><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt; mso-ansi-language: EN-US"
lang=EN-US><STRONG><FONT size=3>[1]<SPAN
style="mso-tab-count: 1"> </SPAN>A.
K. Geim, Science 324, 1530 (2009).<SPAN
style="mso-bidi-font-weight: bold; mso-bidi-font-style: italic"><o:p></o:p></SPAN></FONT></STRONG></SPAN></P>
<P style="MARGIN: 0cm 0cm 0pt" class=KeinLeerraum><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt; mso-ansi-language: EN-US"
lang=EN-US><STRONG><FONT size=3>[2]<SPAN
style="mso-tab-count: 1"> </SPAN>J.
Coraux et al., <SPAN style="mso-bidi-font-weight: bold">Nano Lett<I
style="mso-bidi-font-style: normal">. </I>8, 565,
(2008).<o:p></o:p></SPAN></FONT></STRONG></SPAN></P>
<P style="MARGIN: 0cm 0cm 0pt" class=KeinLeerraum><SPAN><STRONG><FONT
face=Arial><FONT size=2>[3]<SPAN
style="mso-tab-count: 1">
</SPAN>R. van Gastel et al., Appl. Phys. Lett. 95, 121901
(2009).<o:p></o:p></FONT></FONT></STRONG></SPAN></P>
<P style="MARGIN: 0cm 0cm 0pt" class=KeinLeerraum><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt; mso-ansi-language: EN-US"
lang=EN-US><STRONG><FONT size=3>[4]<SPAN
style="mso-tab-count: 1"> </SPAN><?xml:namespace
prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags"
/><st1:place w:st="on"><SPAN
style="mso-bidi-font-weight: bold; mso-bidi-font-style: italic">I.</SPAN></st1:place><SPAN
style="mso-bidi-font-weight: bold; mso-bidi-font-style: italic">
Pletikosić et al., Phys. Rev. Lett., 102, 056808
(2009).</SPAN><o:p></o:p></FONT></STRONG></SPAN></P>
<P style="MARGIN: 0cm 0cm 0pt" class=KeinLeerraum><SPAN><STRONG><FONT
face=Arial><FONT size=2>[5] <SPAN
style="mso-tab-count: 1"> </SPAN>A.T.
N’Diaye et al<I style="mso-bidi-font-style: normal">.,</I> Phys. Rev.
Lett<I style="mso-bidi-font-style: normal">., </I>97, 215501,
(2006).<o:p></o:p></FONT></FONT></STRONG></SPAN></P>
<P style="MARGIN: 0cm 0cm 0pt" class=KeinLeerraum><SPAN><STRONG><FONT
face=Arial><FONT size=2>[6]<SPAN
style="mso-tab-count: 1">
</SPAN>A. T. N’Diaye et al., 11, 103045
(2009).<o:p></o:p></FONT></FONT></STRONG></SPAN></P>
<P style="MARGIN: 0cm 0cm 0pt" class=KeinLeerraum><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt" lang=DE><STRONG><FONT
size=3>[7]<SPAN
style="mso-tab-count: 1"> </SPAN>M.
Hasan C. Kane,<SPAN style="mso-spacerun: yes">
</SPAN>arXiv:1002.3895<SPAN style="mso-spacerun: yes">
</SPAN>(2010).<o:p></o:p></FONT></STRONG></SPAN></P>
<P style="TEXT-ALIGN: justify; LINE-HEIGHT: 150%; MARGIN: 0cm 0cm 10pt"
class=MsoNormal><FONT face=Arial></FONT></SPAN> </P>
<P style="TEXT-ALIGN: justify; LINE-HEIGHT: 150%; MARGIN: 0cm 0cm 10pt"
class=MsoNormal><B style="mso-bidi-font-weight: normal"><SPAN
style="LINE-HEIGHT: 150%; FONT-FAMILY: 'Trajan Pro'; FONT-SIZE: 12pt; mso-bidi-font-family: Arial"><A
href="http://www.ph2.uni-koeln.de/379.html"><FONT
color=#800080>http://www.ph2.uni-koeln.de/379.html</FONT></A><o:p></o:p></SPAN></B></P></TD></TR>
<TR style="mso-yfti-irow: 5; mso-yfti-lastrow: yes">
<TD
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<P style="TEXT-ALIGN: center; LINE-HEIGHT: normal; MARGIN: 0cm 0cm 0pt"
class=MsoNormal align=center><B style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: 'Trajan Pro'; FONT-SIZE: 12pt">Voditelji seminara
IF-a: <SPAN style="mso-spacerun: yes"> </SPAN>Berislav Horvatić<SPAN
style="mso-spacerun: yes"> </SPAN>& <SPAN
style="mso-spacerun: yes"> </SPAN>Ivica
Živković<o:p></o:p></SPAN></B></P></TD></TR></TBODY></TABLE></FONT></DIV></BODY></HTML>