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<DIV style="TEXT-ALIGN: center" data-mce-style="text-align: center;"><STRONG><B><SPAN lang=HR style="FONT-SIZE: 16pt; COLOR: black" data-mce-style="font-size: 16pt; color: black;"><IMG><IMG src="cid:fb559ca8379da07816ebeb024a88bd13dae62179@zimbra" data-mce-src="cid:fb559ca8379da07816ebeb024a88bd13dae62179@zimbra"></SPAN></B></STRONG></DIV>
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<P style="TEXT-ALIGN: center; MARGIN: 0px" align=center data-mce-style="text-align: center; margin: 0px;"><B><SPAN lang=EN-GB style="FONT-FAMILY: 'Century Gothic',sans-serif; COLOR: #5f5f5f" data-mce-style="font-family: 'Century Gothic',sans-serif; color: #5f5f5f;">Institut za fiziku, Bijenička cesta 46,</SPAN></B></P>
<P style="TEXT-ALIGN: center; MARGIN: 0px" align=center data-mce-style="text-align: center; margin: 0px;"><B><SPAN lang=EN-GB style="FONT-FAMILY: 'Century Gothic',sans-serif; COLOR: #5f5f5f" data-mce-style="font-family: 'Century Gothic',sans-serif; color: #5f5f5f;">predavaonica u zgradi Mladen Paić</SPAN></B></P><STRONG><B><SPAN lang=EN-GB style="FONT-SIZE: 14pt; FONT-FAMILY: 'Century Gothic',sans-serif; COLOR: #993300" data-mce-style="font-size: 14pt; font-family: 'Century Gothic',sans-serif; color: #993300;">petak, 12. lipnja 2015., u 15:00 sati</SPAN></B><BR></STRONG></DIV>
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<DIV style="TEXT-ALIGN: center" data-mce-style="text-align: center;"><SPAN lang=EN-GB style="FONT-SIZE: 16pt; FONT-FAMILY: 'Times New Roman',serif; COLOR: #55913c" data-mce-style="font-size: 16pt; font-family: 'Times New Roman',serif; color: #55913c;"><SPAN lang=EN-GB style="FONT-SIZE: 16pt; FONT-FAMILY: 'Times New Roman',serif; COLOR: #55913c" data-mce-style="font-size: 16pt; font-family: 'Times New Roman',serif; color: #55913c;"><STRONG>Electron correlations, superconductivity and magnetism in orbitally-degenerate molecular solids</STRONG></SPAN></SPAN><SPAN lang=EN-GB style="FONT-SIZE: 16pt; FONT-FAMILY: 'Times New Roman',serif; COLOR: #55913c" data-mce-style="font-size: 16pt; font-family: 'Times New Roman',serif; color: #55913c;"><STRONG> </STRONG></SPAN></DIV>
<DIV style="TEXT-ALIGN: center" data-mce-style="text-align: center;"><B><SPAN lang=EN-GB style="FONT-SIZE: 14pt; FONT-FAMILY: 'Century Gothic',sans-serif" data-mce-style="font-size: 14pt; font-family: 'Century Gothic',sans-serif;">Prof. Denis Arčon</SPAN></B></DIV>
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<DIV style="TEXT-ALIGN: center" data-mce-style="text-align: center;"><B><B><B><SPAN lang=EN-GB style="FONT-SIZE: 11pt; FONT-FAMILY: 'Century Gothic',sans-serif" data-mce-style="font-size: 11pt; font-family: 'Century Gothic',sans-serif;">Jožef Stefan Institute and Faculty of mathematics and physics, University of Ljubljana, Slovenia</SPAN></B></B></B><B><B><SPAN lang=EN-GB style="FONT-SIZE: 11pt; FONT-FAMILY: 'Century Gothic',sans-serif" data-mce-style="font-size: 11pt; font-family: 'Century Gothic',sans-serif;"> </SPAN></B></B></DIV>
<DIV style="TEXT-ALIGN: center" data-mce-style="text-align: center;"><SPAN style="FONT-SIZE: small; FONT-FAMILY: Arial" data-mce-style="font-size: small; font-family: Arial;"></SPAN><BR> </DIV>
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<P style="TEXT-ALIGN: left; MARGIN: 0px; LINE-HEIGHT: 115%" data-mce-style="text-align: left; margin: 0px; line-height: 115%;"><SPAN style="FONT-FAMILY: arial,helvetica,sans-serif" data-mce-style="font-family: arial,helvetica,sans-serif;">Light element molecular solids with s/p-based outer electrons in which a fine balance exists between electron-phonon coupling and electron correlation energies can give rise to some most intriguing electronic properties usually associated only with the transition-metal ions. These systems are naturally narrow-band solids where on-site repulsion is comparable to or larger than the electronic bandwidth. Moreover, in cases when the degeneracy of the frontier molecular orbitals is preserved the interplay between the Hund's rule coupling and Jahn-Teller effect lead to a very rich phase diagram where correlated superconducting state borders the Mott-insulating antiferromagnetic phase [1,2].</SPAN></P>
<P style="TEXT-ALIGN: left; MARGIN: 0px; LINE-HEIGHT: 115%" data-mce-style="text-align: left; margin: 0px; line-height: 115%;"><SPAN style="FONT-FAMILY: arial,helvetica,sans-serif" data-mce-style="font-family: arial,helvetica,sans-serif;">In this talk we will first report on our study of face-centred-cubic (f.c.c.) alkali-doped fullerides, A<SPAN style="FONT-SIZE: x-small; FONT-FAMILY: " data-mce-style="font-size: x-small;">3</SPAN>C<SPAN style="FONT-SIZE: x-small; FONT-FAMILY: " data-mce-style="font-size: x-small;">60</SPAN> (A = alkali metal) with triply-degenerated <EM>t</EM><SPAN style="FONT-SIZE: x-small; FONT-FAMILY: " data-mce-style="font-size: x-small;">1u</SPAN> frontier molecular orbitals that can be tuned continuously through the bandwidth-controlled antiferromagnetic Mott insulator-metal/superconductor transition by chemical or physical pressure [1,2]. Both competing phases will be evaluated by employing pressure- and temperature-dependent nuclear magnetic resonance (NMR) studies. In particular, the size and the symmetry of the superconducting gap close to the metal/superconductor-insulator boundary will be examined [3,4].</SPAN></P>
<P style="TEXT-ALIGN: left; MARGIN: 0px; LINE-HEIGHT: 115%" data-mce-style="text-align: left; margin: 0px; line-height: 115%;"><SPAN style="FONT-FAMILY: arial,helvetica,sans-serif" data-mce-style="font-family: arial,helvetica,sans-serif;">Alkali-metal superoxides and sesquioxides (AO<SPAN style="FONT-SIZE: x-small" data-mce-style="font-size: x-small;">2</SPAN> and A<SPAN style="FONT-SIZE: x-small" data-mce-style="font-size: x-small;">4</SPAN>O<SPAN style="FONT-SIZE: x-small" data-mce-style="font-size: x-small;">6</SPAN>) belong to the similar class of molecular solids showing unusual magnetism that depends on the orbital ordering of π* molecular orbitals [5,6]. The richness of these systems stem from the simultaneous presence of orientational, charge, orbital, and spin degrees of freedom that are strongly coupled as revealed from the comprehensive NMR and EPR studies.</SPAN></P>
<P style="TEXT-ALIGN: left; MARGIN: 0px; LINE-HEIGHT: 115%" data-mce-style="text-align: left; margin: 0px; line-height: 115%;"><SPAN style="FONT-FAMILY: arial,helvetica,sans-serif" data-mce-style="font-family: arial,helvetica,sans-serif;"></SPAN> </P>
<P style="TEXT-ALIGN: left; MARGIN: 0px; LINE-HEIGHT: 115%" data-mce-style="text-align: left; margin: 0px; line-height: 115%;"><SPAN style="FONT-FAMILY: arial,helvetica,sans-serif" data-mce-style="font-family: arial,helvetica,sans-serif;">[1] Y. Takabayashi, D. Arčon <EM>et al.</EM>, Science <STRONG>323</STRONG>, 1585 (2009).<BR>[2] A. Y. Ganin, D. Arčon <EM>et al.</EM>, Nature <STRONG>466</STRONG>, 221 (2010).<BR>[3] A. Potočnik <EM>et al.</EM>, Sci. Rep. <STRONG>4</STRONG>, 4265 (2014).<BR>[4] R. H. Zadik <EM>et al.</EM>, Sci. Adv. <STRONG>1</STRONG>, e1500059 (2015).<BR>[5] D. Arčon <EM>et al.</EM>, Phys. Rev. B <STRONG>88</STRONG>, 224409 (2013).<BR>[6] T. Knaflič <EM>et al.</EM>, Phys. Rev. B <STRONG>91</STRONG>, 174419 (2015). M. Klanjšek et al., arXiv:1409.4818.</SPAN></P>
<P style="TEXT-ALIGN: left; MARGIN: 0px; LINE-HEIGHT: 115%" data-mce-style="text-align: left; margin: 0px; line-height: 115%;"><SPAN style="FONT-FAMILY: arial,helvetica,sans-serif" data-mce-style="font-family: arial,helvetica,sans-serif;"></SPAN> </P>
<P style="TEXT-ALIGN: left; MARGIN: 0px; LINE-HEIGHT: 115%" data-mce-style="text-align: left; margin: 0px; line-height: 115%;"><SPAN style="FONT-FAMILY: arial,helvetica,sans-serif" data-mce-style="font-family: arial,helvetica,sans-serif;">E-mail: <A href="mailto:denis.arcon@ijs.si" target=_blank data-mce-href="mailto:denis.arcon@ijs.si">denis.arcon@ijs.si</A></SPAN></P>
<P style="TEXT-ALIGN: left; MARGIN: 0px; LINE-HEIGHT: 115%" data-mce-style="text-align: left; margin: 0px; line-height: 115%;"> </P></DIV>
<DIV style="TEXT-ALIGN: left" data-mce-style="text-align: left;"><B><SPAN lang=EN-GB style="FONT-SIZE: 12pt; FONT-FAMILY: 'Century Gothic',sans-serif" data-mce-style="font-size: 12pt; font-family: 'Century Gothic',sans-serif;"><B><SPAN lang=EN-GB style="FONT-SIZE: 11pt; FONT-FAMILY: 'Century Gothic',sans-serif" data-mce-style="font-size: 11pt; font-family: 'Century Gothic',sans-serif;"> </SPAN></B></SPAN></B></DIV>
<DIV style="TEXT-ALIGN: left" data-mce-style="text-align: left;"><B><SPAN lang=EN-GB style="FONT-SIZE: 12pt; FONT-FAMILY: 'Century Gothic',sans-serif" data-mce-style="font-size: 12pt; font-family: 'Century Gothic',sans-serif;"><B><SPAN lang=EN-GB style="FONT-SIZE: 11pt; FONT-FAMILY: 'Century Gothic',sans-serif" data-mce-style="font-size: 11pt; font-family: 'Century Gothic',sans-serif;"> </SPAN></B></SPAN></B></DIV>
<DIV style="TEXT-ALIGN: right" data-mce-style="text-align: right;"><B><SPAN lang=EN-GB style="FONT-SIZE: 12pt; FONT-FAMILY: 'Century Gothic',sans-serif" data-mce-style="font-size: 12pt; font-family: 'Century Gothic',sans-serif;"><B><SPAN lang=EN-GB style="FONT-SIZE: 11pt; FONT-FAMILY: 'Century Gothic',sans-serif" data-mce-style="font-size: 11pt; font-family: 'Century Gothic',sans-serif;">Voditelji seminara IF-a: <A href="mailto:natasav@ifs.hr" target=_blank data-mce-href="mailto:natasav@ifs.hr">Nataša Vujičić</A> i <A href="mailto:damirs@ifs.hr" target=_blank data-mce-href="mailto:damirs@ifs.hr">Damir Starešinić</A></SPAN></B></SPAN></B><BR></DIV></DIV></DIV></DIV></DIV>
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