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</o:shapelayout></xml><![endif]--></head><body lang=SL link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><table class=MsoNormalTable border=0 cellpadding=0 width="100%" style='width:100.0%'><tr><td valign=top style='padding:1.5pt 1.5pt 1.5pt 1.5pt'><p><a href="https://dnevi.ijs.si/"><span style='font-family:Roboto;text-decoration:none'><img border=0 width=1024 height=256 style='width:10.6666in;height:2.6666in' id="Picture_x0020_2" src="cid:part1.vClg9duT.NegbpViY@ijs.si" alt=dnevi.ijs.si></span></a><o:p></o:p></p></td></tr></table><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Vabimo vas na institutski kolokvij ob letošnjih Dnevih Jožefa Stefana, ki bo <b>danes, <span style='color:#338684'>v ponedeljek, 20. marca 2023, ob 13.05 uri »v živo«</span></b><span style='color:#338684'> v Veliki predavalnici Instituta »Jožef Stefan«</span><strong><span style='font-family:"Calibri",sans-serif;color:red'> </span></strong><strong><span style='font-family:"Calibri",sans-serif;font-weight:normal'>na Jamovi cesti 39 v Ljubljani. Na voljo bodo tudi kava, pijača in prigrizki.</span></strong><b><span style='font-family:"Times New Roman",serif'><o:p></o:p></span></b></p><p class=MsoNormal><strong><span lang=EN-US style='font-family:"Calibri",sans-serif'><o:p> </o:p></span></strong></p><p class=MsoNormal><strong><span lang=EN-US style='font-family:"Calibri",sans-serif'><o:p> </o:p></span></strong></p><p class=MsoNormal><a name="_Hlk57188111"><b><span style='font-size:12.0pt'>prof. dr. Frédéric Mila</span></b></a><span style='mso-bookmark:_Hlk57188111'></span><span style='font-size:12.0pt'><o:p></o:p></span></p><p class=MsoNormal><i>Zvezna politehnična šola v Lausanni (EPFL), Švica<o:p></o:p></i></p><p class=MsoNormal><i><o:p> </o:p></i></p><p class=MsoNormal><b><span style='font-size:14.0pt;color:#338684'>Kvantne spinske tekočine in njihove eksperimentalne uresničitve<o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:12.0pt'><o:p> </o:p></span></p><p class=MsoNormal><a name="_Hlk57031873">Kvantne spinske tekočine so stare toliko kot kvantni magnetizem: sploh prvi rešen model kvantnega magnetizma, Heisenbergova veriga spinov 1/2 (Bethe, 1931), je kvantna spinska tekočina. Skoraj stoletje kasneje je to področje raziskav dejavnejše kot kadarkoli prej, s številnimi posplošitvami, vključno z dvodimenzionalnimi modeli, in številnimi spojinami, katerih lastnosti ni mogoče razumeti v okviru magnetnega reda dolgega dosega. V predavanju bom naredil pregled najpomembnejših prebojev od zgodnjih osemdesetih let naprej, od Haldaneove domneve o verigi spinov 1, spinskih tekočin z naključno valenčno vezjo kot predhodnicah superprevodnosti, algebraičnih spinskih tekočin do antiferomagneta spinov 1/2 na mreži kagome. Končal bom z modelom Shastryja in Sutherlanda ter njegovo privlačno eksperimentalno uresničitvijo SrCu2(BO3)2, v kateri se pojavita zaporedje magnetizacijskih platojev in s tlakom povzročena kritična točka, ki je analogna tisti pri vodi.</a><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Predavanje bo v angleščini.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Napovednik predavanja najdete tudi na naslovu <span lang=EN-US><a href="http://www.ijs.si/ijsw/Koledar_prireditev"><span lang=SL style='color:#7F7F7F'>http://www.ijs.si/ijsw/Koledar_prireditev</span></a></span>, posnetke preteklih predavanj<span style='color:blue'> </span>pa na <span lang=EN-US><a href="https://bit.ly/2YH8LYk"><span lang=SL style='color:#7F7F7F'>Arhiv TV IJS</span></a></span> in <span lang=EN-US><a href="http://videolectures.net/kolokviji_ijs"><span lang=SL style='color:#7F7F7F'>http://videolectures.net/kolokviji_ijs</span></a></span>.<span lang=EN-US style='font-size:12.0pt'><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><b><span style='color:#338684'>Lepo vabljeni!<o:p></o:p></span></b></p><p class=MsoNormal><strong><span lang=EN-US style='font-family:"Calibri",sans-serif'><o:p> </o:p></span></strong></p><p class=MsoNormal><strong><span lang=EN-US style='font-family:"Calibri",sans-serif'><o:p> </o:p></span></strong></p><p class=MsoNormal><span lang=EN-US>--</span><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='color:black'>We invite you to the </span>i<span style='color:black'>nstitute colloquium</span> in the framework of<span style='color:black'> this year's Jožef Stefan days</span>, which will take place <b>today,<span style='color:black'> </span><span style='color:#338684'>Monday, March 20, 2023, at 1:05 PM</span></b> <b><span style='color:#338684'>»live«</span></b><span style='color:#338684'> in the Main lecture hall</span> of Jožef Stefan Institute<span style='color:#338684'> </span>at Jamova cesta 39 in Ljubljana. Coffee, drinks and snacks will also be available.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><b><span style='font-size:12.0pt'>Prof. dr. Frédéric Mila<o:p></o:p></span></b></p><p class=MsoNormal><i>Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland<o:p></o:p></i></p><p class=MsoNormal><b><o:p> </o:p></b></p><p class=MsoNormal><b><span style='font-size:14.0pt;color:#338684'>Quantum spin liquids and their experimental realizations<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:14.0pt;color:#338684'><o:p> </o:p></span></b></p><p class=MsoNormal><strong><span style='font-family:"Calibri",sans-serif;font-weight:normal'>Quantum spin liquids are as old as quantum magnetism: the first model of quantum magnetism ever solved, the spin-1/2 Heisenberg chain (Bethe, 1931), is a quantum spin liquid. Almost a century later, this field of research is more active than ever, with several generalizations including two-dimensional models, and many compounds whose properties cannot be understood in terms of magnetic long-range order. In this talk, I will review the most striking developments since the early eighties including the Haldane’s conjecture on the spin-1 chain, random-valence-bond spin liquids as precursors to superconductivity, algebraic spin liquids and the kagome spin-1/2 antiferromagnet. I will finish with the Shastry-Sutherland model and its fascinating experimental realization SrCu2(BO3)2, with its sequence of magnetization plateaus and its pressure-induced critical point analog to that of water.</span></strong><strong><span style='font-family:"Calibri",sans-serif'><o:p></o:p></span></strong></p><p class=MsoNormal><strong><span style='font-family:"Calibri",sans-serif;font-weight:normal'><o:p> </o:p></span></strong></p><p class=MsoNormal><strong><span style='font-family:"Calibri",sans-serif;font-weight:normal'><o:p> </o:p></span></strong></p><p class=MsoNormal><strong><span style='font-family:"Calibri",sans-serif;font-weight:normal'>The lecture will be held in English.<o:p></o:p></span></strong></p><p class=MsoNormal><strong><span style='font-family:"Calibri",sans-serif;font-weight:normal'><o:p> </o:p></span></strong></p><p class=MsoNormal>You can find the lecture trailer at <span lang=EN-US><a href="http://www.ijs.si/ijsw/Koledar_prireditev"><span lang=SL style='color:#7F7F7F'>http://www.ijs.si/ijsw/Koledar_prireditev</span></a></span>, and recordings of past lectures at <span lang=EN-US><a href="https://bit.ly/2YH8LYk"><span lang=SL style='color:#7F7F7F'>Arhiv TV IJS</span></a></span> and <span lang=EN-US><a href="http://videolectures.net/kolokviji_ijs"><span lang=SL style='color:#7F7F7F'>http://videolectures.net/kolokviji_ijs</span></a></span>.<strong><span style='font-family:"Calibri",sans-serif;font-weight:normal'><o:p></o:p></span></strong></p><p class=MsoNormal><strong><span style='font-family:"Calibri",sans-serif;font-weight:normal'><o:p> </o:p></span></strong></p><p class=MsoNormal><b><span style='color:#338684'>Cordially invited!<o:p></o:p></span></b></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>