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FONT-FAMILY: Helvetica,Arial,sans-serif; FONT-WEIGHT: normal; COLOR: #000; FONT-STYLE: normal" data-mce-style="font-size: 12pt; text-decoration: none; font-family: Helvetica,Arial,sans-serif; font-weight: normal; color: #000; font-style: normal;"><div style="FONT-SIZE: 12pt; FONT-FAMILY: times new roman, new york, times, serif; COLOR: #000000" data-mce-style="font-size: 12pt; font-family: times new roman, new york, times, serif; color: #000000;"><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><div style="TEXT-ALIGN: center" data-mce-style="text-align: center;"><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, 6. svibnja 2016., u 11:00 sati</span></b><br></strong></div><div style="TEXT-ALIGN: center" data-mce-style="text-align: center;"><strong></strong> </div><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>Magneto-optički potpis bezmasenih Kaneovih elektrona u kadmijevom arsenidu, Cd<span style="font-size: small;" data-mce-style="font-size: small;">3</span>As<span style="font-size: small;" data-mce-style="font-size: small;">2</span><br></strong></span></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;">dr. Ana Akrap<br></span></b></div><div style="TEXT-ALIGN: center" data-mce-style="text-align: center;"><b></b> </div><div style="TEXT-ALIGN: center" data-mce-style="text-align: center;"><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;">Faculty of Science, University of Geneva, Switzerland<br></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><div style="TEXT-ALIGN: left" data-mce-style="text-align: left;"><p style="margin: 0px;" data-mce-style="margin: 0px;"><span style="font-family: arial, helvetica, sans-serif; font-size: 12pt;" data-mce-style="font-family: arial, helvetica, sans-serif; font-size: 12pt;">Kadmijev arsenid je nedavno proglašen trodimenzionalnim Diracovim polumetalom, u kojemu su dva Diracova stošca, međusobno razdvojena oko točke Gama u Brilloiunovoj zoni. Dok nekoliko ARPES radova pokazuje da se ovi stošci šire preko nekoliko stotina milielektronvolta [1], drugi eksperimenti, poput STM-a, upućuju na red veličine manje dimenzije Diracovih stožaca [2].</span></p><p style="margin: 0px;" data-mce-style="margin: 0px;"><span style="font-family: arial, helvetica, sans-serif; font-size: 12pt;" data-mce-style="font-family: arial, helvetica, sans-serif; font-size: 12pt;"><br></span></p><p style="margin: 0px;" data-mce-style="margin: 0px;"><span style="font-family: arial, helvetica, sans-serif;" data-mce-style="font-family: arial, helvetica, sans-serif;">Naši nedavni rezultati magneto-optičkog istraživanja, u poljima do 33 T, jasno pokazuju tragove bezmasenih čestica [3]. Međutim, dublje razumijevanje rezultata zahtijeva da izbacimo sliku Diracovih fermiona. Koristeći Bodnarov model [4] razvijen krajem sedamdesetih godina, pokazuje se da su bezmasene čestice u kadmijevom arsenidu drugačije prirode - to su Kaneovi elektroni. Mada se Diracove čestice sasvim vjerojatno mogu naći u ovome spoju, njihova je energijska skala toliko niska da ih nije moguće doseći infracrvenom spektroskopijom.</span><br><span style="font-family: arial, helvetica, sans-serif;" data-mce-style="font-family: arial, helvetica, sans-serif;"></span></p><p style="margin: 0px;" data-mce-style="margin: 0px;"><span style="font-family: arial, helvetica, sans-serif;" data-mce-style="font-family: arial, helvetica, sans-serif;"><br></span></p><p style="margin: 0px;" data-mce-style="margin: 0px;"><span style="font-family: arial, helvetica, sans-serif;" data-mce-style="font-family: arial, helvetica, sans-serif;">[1] Z. Liu et al., Nature Mater. <strong>13</strong>, 677 (2014); M. Neupane et al., Nature Comm. <strong>5</strong>, 3786 (2014); S. Borisenko et al, Phys. Rev. Lett. <strong>113</strong>, 027603 (2014).</span><br><span style="font-family: arial, helvetica, sans-serif;" data-mce-style="font-family: arial, helvetica, sans-serif;">[2] S. Jeon et al., Nature Mater. <strong>13</strong>, 851 (2014).</span><br><span style="font-family: arial, helvetica, sans-serif;" data-mce-style="font-family: arial, helvetica, sans-serif;">[3] A. Akrap et al., arXiv:1604.00038 (2016).</span><br><span style="font-family: arial, helvetica, sans-serif;" data-mce-style="font-family: arial, helvetica, sans-serif;">[4] J. Bodnar, in Proc. III Conf. Narrow-Gap Semiconductors, p. 311. (Elsevier, 1977).</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><br></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></div></div></div></div></div><div> </div></div></div></div></div></div></div></div></div></div></div></div></div><div><br></div></div></div><br></div></div><br></div></div><div><br></div></div></div><div><br></div></div></div><div><br></div></div></div><div><br></div></div></div><div><br></div></div></body></html>