<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div data-marker="__QUOTED_TEXT__"><div style="" data-mce-style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000;"><div><p style="margin: 15px;" data-mce-style="margin: 15px;"></p><div style="color: rgb(0, 0, 0); font-family: "times new roman", "new york", times, serif; font-size: 12pt; text-align: center;" data-mce-style="color: #000000; font-family: 'times new roman', 'new york', times, serif; font-size: 12pt; text-align: center;"><strong><b><span lang="HR" style="font-size: 16pt; color: black;" data-mce-style="font-size: 16pt; color: black;"><img src="cid:36b283f600499f4aed257591621681b48550c75a@zimbra" data-mce-src="cid:36b283f600499f4aed257591621681b48550c75a@zimbra"><img><img src="cid:fb559ca8379da07816ebeb024a88bd13dae62179@zimbra" data-mce-src="cid:fb559ca8379da07816ebeb024a88bd13dae62179@zimbra"></span></b></strong></div><div style="text-align: center;" data-mce-style="color: #000000; font-family: 'times new roman', 'new york', times, serif; font-size: 12pt; text-align: center;"><p style="text-align: center; margin: 0px;" align="center" data-mce-style="text-align: center; margin: 0px;"><span lang="EN-GB" style="" data-mce-style="font-family: 'Century Gothic',sans-serif; color: #5f5f5f;"><span color="#5f5f5f" face="Century Gothic, sans-serif" data-mce-style="color: #5f5f5f; font-family: 'Century Gothic', sans-serif;" style="color: #5f5f5f; font-family: 'Century Gothic', sans-serif;"><b>ZAJEDNIČKI SEMINAR INSTITUTA ZA FIZIKU I ZNANSTVENOG CENTRA IZVRSNOSTI QuantiXLie</b></span><br data-mce-bogus="1"></span></p><p style="text-align: center; margin: 0px;" align="center" data-mce-style="text-align: center; margin: 0px;"><span lang="EN-GB" style="" data-mce-style="font-family: 'Century Gothic',sans-serif; color: #5f5f5f;"><span color="#5f5f5f" face="Century Gothic, sans-serif" data-mce-style="color: #5f5f5f; font-family: 'Century Gothic', sans-serif;" style="color: #5f5f5f; font-family: 'Century Gothic', sans-serif;"><b><br data-mce-bogus="1"></b></span></span></p><p style="color: rgb(0, 0, 0); font-family: "times new roman", "new york", times, serif; font-size: 12pt; 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="color: rgb(0, 0, 0); font-family: "times new roman", "new york", times, serif; font-size: 12pt; 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 style="color: #000000; font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;" data-mce-style="color: #000000; font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"><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;">četvrtak, 25. listopada 2018., u 11:00 sati</span></b><br></strong></div><div style="color: rgb(0, 0, 0); font-family: "times new roman", "new york", times, serif; font-size: 12pt; text-align: center;" data-mce-style="color: #000000; font-family: 'times new roman', 'new york', times, serif; font-size: 12pt; text-align: center;"><strong></strong> </div><div style="text-align: center;" data-mce-style="text-align: center;"><span color="#55913c" face="Times New Roman, serif" data-mce-style="color: #55913c; font-family: 'Times New Roman', serif;" style="color: #55913c; font-family: 'Times New Roman', serif;"><span style="font-size: 21.3333px;" data-mce-style="font-size: 21.3333px;"><b>Disorder-driven quantum transition in relativistic semimetals</b></span></span></div><div style="color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 12pt; text-align: center;" data-mce-style="text-align: center;"><strong style="color: #000000; font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;" data-mce-style="color: #000000; font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"><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;">dr. </span></strong><span style="font-family: 'Century Gothic', sans-serif;" data-mce-style="font-family: 'Century Gothic', sans-serif;"><span style="font-size: 18.6667px;" data-mce-style="font-size: 18.6667px;"><b>Andrei A. Fedorenko</b></span></span></div><div style="color: rgb(0, 0, 0); font-family: "times new roman", "new york", times, serif; font-size: 12pt; text-align: center;" data-mce-style="color: #000000; font-family: 'times new roman', 'new york', times, serif; font-size: 12pt; text-align: center;"><b></b> </div><div style="text-align: center;" data-mce-style="text-align: center;"><span style="color: rgb(0, 0, 0); font-family: "Century Gothic", sans-serif; font-size: 12pt;" data-mce-style="font-family: 'Century Gothic', sans-serif;"><span style="font-size: 14.6667px;" data-mce-style="font-size: 14.6667px;"><b>Centar za </b></span></span><span face="Century Gothic, sans-serif" data-mce-style="font-family: 'Century Gothic', sans-serif;" style="font-family: 'Century Gothic', sans-serif;"><span style="font-size: 14.6667px;" data-mce-style="font-size: 14.6667px;"><b>Ecole Normale Supérieure</b></span></span><b style="color: #000000; font-family: 'Century Gothic', sans-serif; font-size: 14.6667px;" data-mce-style="color: #000000; font-family: 'Century Gothic', sans-serif; font-size: 14.6667px;">, Lyon, France</b></div><div style="color: rgb(0, 0, 0); font-family: "times new roman", "new york", times, serif; font-size: 12pt; text-align: center;" data-mce-style="color: #000000; font-family: 'times new roman', 'new york', times, serif; font-size: 12pt; text-align: center;"><span style="font-size: small; font-family: Arial;" data-mce-style="font-size: small; font-family: Arial;"></span><br> </div><p style="margin: 15px; text-align: justify;" data-mce-style="margin: 15px; text-align: justify;">The recent discovery of materials whose electronic properties are described by three-dimensional relativistic fermions opened fascinating opportunities to study physical phenomena which have never been accessible before. Among these phenomena is a remarkable disorder-driven quantum transition in the simplest relativistic phases, the Weyl semimetals. This transition is fascinating: it is different from the Anderson transition, yet accessible experimentally. Despite a burst of papers, the understanding of this transition is still lacking. A standard approach relates this transition to the <em>U(N)</em> Gross-Neveu model in the limit of <em>N</em>→0 [1]. However, there is little agreement between the predictions of numerical simulations and the various analytical results derived from the Gross-Neveu model.</p><p style="margin: 15px; text-align: justify;" data-mce-style="margin: 15px; text-align: justify;">Recently we have developed a functional renormalization group amenable to include non-analytic effects [2]. We show that the previously considered fixed point is infinitely unstable, demonstrating the necessity to describe fluctuations beyond the usual Gaussian approximation. Furthermore, the disorder distribution renormalizes following the so-called porous medium equation which appears in different context in fluid mechanics, mathematical biology, boundary layer theory, and other fields. We relate self-similar solutions of the porous medium equation to a universal mechanism of generation of finite density of states responsible for the transition. We find that the transition is controlled by a non-analytic fixed point drastically different from the fixed point of the <em>U(N)</em> Gross-Neveu model. Our findings provide a framework for extensions to problems ranging from the mass generation at the chiral symmetry breaking transitions in the high energy physics to non-linear sigma models with infinitely many relevant operators.</p><p style="color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 12pt; margin: 15px;" data-mce-style="margin: 15px;">[1] T. Louvet, D. Carpentier, A. A. Fedorenko, Phys. Rev. B <strong>94</strong>, 220201(R) (2016)</p><p style="margin: 15px;" data-mce-style="margin: 15px;">[2] I. Balog, D. Carpentier, A. A. Fedorenko, arXiv:1710.07932 (to appear in Phys. Rev. Lett.)</p><p></p><p style="color: rgb(0, 0, 0); font-family: "times new roman", "new york", times, serif; font-size: 12pt; margin: 0px;" data-mce-style="color: #000000; font-family: 'times new roman', 'new york', times, serif; font-size: 12pt; margin: 0px;"><b style="font-size: 12pt;" data-mce-style="font-size: 12pt;"><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;" data-mce-style="font-size: 11pt;"> </span></b></span></b><span style="font-family: arial, helvetica, sans-serif;" data-mce-style="font-family: arial, helvetica, sans-serif;"></span></p></div><div style="color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 12pt; text-align: left;" data-mce-style="color: #000000; font-family: arial, helvetica, sans-serif; font-size: 12pt; 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><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:hrvoje@ifs.hr" target="_blank" data-mce-href="mailto:hrvoje@ifs.hr">Hrvoje Skenderović</a> i <a href="mailto:damirs@ifs.hr" target="_blank" data-mce-href="mailto:damirs@ifs.hr">Damir Starešinić<br></a></span></b></span></b></div></div><br></div></div></body></html>