<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div data-marker="__QUOTED_TEXT__"><div style="font-family:'arial' , 'helvetica' , sans-serif;font-size:12pt;color:#000000"><div><div style="font-family:'arial' , 'helvetica' , sans-serif;font-size:12pt;color:#000000"><br><div><div><div style="color:#000000;text-align:center"><strong><b><span style="font-size:16pt;color:black" lang="HR"><img src="cid:8f3efd7aefabcc3824be2e3cb5147710f0f30217@zimbra" data-mce-src="cid:8f3efd7aefabcc3824be2e3cb5147710f0f30217@zimbra"></span></b></strong></div><div style="color:#000000;text-align:center"><p style="text-align:center;margin:0px" align="center"><span style="font-family:'arial' , 'helvetica' , sans-serif;font-size:13pt"><b><span style="color:#5f5f5f" lang="EN-GB">Institut za fiziku, Bijenička cesta 46,</span></b></span></p><p style="text-align:center;margin:0px" align="center"><span style="font-family:'arial' , 'helvetica' , sans-serif;font-size:13pt"><b><span style="color:#5f5f5f" lang="EN-GB">predavaonica u zgradi Mladen Paić</span></b></span></p><strong><span style="font-family:'arial' , 'helvetica' , sans-serif;font-size:16pt"><b><span lang="EN-GB">četvrtak, <span class="Object" id="OBJ_PREFIX_DWT1022_com_zimbra_phone">3. 10. 2019</span>. u 15:00 sati</span></b></span><br></strong></div><div style="color:#000000;text-align:center"><strong></strong> </div><div style="text-align:center"><span style="color:#55913c;font-family:'arial' , 'helvetica' , sans-serif;font-size:12pt"><span style="font-size:21.3333px"><b>Intercalation of Epitaxial Graphene and Hexagonal Boron Nitride</b></span></span></div><div style="text-align:center"><span style="font-family:'arial' , 'helvetica' , sans-serif;font-size:16pt"><b>Prof. Dr. Carsten Busse<br></b></span></div><div style="color:#000000;text-align:center"><span style="font-family:'arial' , 'helvetica' , sans-serif;font-size:16pt"> </span></div><div style="text-align:center"><div style="text-align:center"><strong><span style="font-family:'century gothic' , sans-serif"><span style="font-family:'century gothic' , sans-serif"><span style="font-size:14.6667px"><span style="font-family:'arial' , 'helvetica' , sans-serif;font-size:13pt">Department Physik, Universit<span lang="de-DE">ä</span>t Siegen, 57068 Siegen, Germany </span><br></span></span></span></strong></div></div><div style="color:#000000;text-align:center"><span style="font-size:small;font-family:'arial'"></span> </div><p class="western" style="margin:0px;line-height:125%" align="justify"><span style="font-size:12pt">Two-dimensional materials like graphene (gr) and hexagonal boron nitride (hBN) can be epitaxially grown on transition metal surfaces as Ir(111) in high structural quality. The exact geometry is determined using scanning tunneling microscopy (STM) in-plane and x-ray standing waves (XSW) out of plane and compared to results from density functional theory (DFT). We find a delicate interplay between physisorption and chemisorption due to the inherent lattice mismatch which leads to superperiodic structures. These moiré patterns induce changes in the electronic structure and can serve as templates for the adsorption of atoms and molecules.</span></p><p class="western" style="margin:0px;line-height:125%" align="justify"><span style="font-size:12pt"></span><br></p><p class="western" style="margin:0px;line-height:125%" align="justify"><span style="font-size:12pt">Significant modifications arise upon intercalation of alkali metals between the ultrathin epitaxial layers and their substrate. For both hBN/Ir(111) and gr/Ir(111) we find that intercalation removes the residual interaction with the substrate and in consequence irons out the corrugation of the 2D materials. Here, Li intercalation is most efficient as already small coverages lead to full decoupling. In addition, graphene is strongly doped by the charge transfer from the alkali atoms. In the case of hBN, intercalated Cs leads to a surface dipole which in turn strongly shifts the π</span><span style="font-size:12pt">-bands, a step towards the experimental determination of the band gap of hBN.</span></p><br><br></div><span style="font-family:'arial' , 'helvetica' , sans-serif;font-size:13pt"><b><span lang="EN-GB"><span lang="EN-GB"> </span></span></b><b><span lang="EN-GB"><span lang="EN-GB">Voditelji seminara IF-a: <span class="Object" id="OBJ_PREFIX_DWT1023_ZmEmailObjectHandler"><a href="mailto:balog@ifs.hr" rel="nofollow%20noopener%20noreferrer%20nofollow%20noopener%20noreferrer nofollow noopener noreferrer" target="_blank">Ivan Balog</a></span> i <span class="Object" id="OBJ_PREFIX_DWT1024_ZmEmailObjectHandler"><a href="mailto:ddominko@ifs.hr" rel="nofollow%20noopener%20noreferrer%20nofollow%20noopener%20noreferrer nofollow noopener noreferrer" target="_blank">Damir Dominko</a></span></span></span></b></span><br></div><div><span style="font-size:12pt;font-family:'century gothic' , sans-serif" lang="EN-GB"><span style="font-size:11pt;font-family:'gothic'" lang="EN-GB"><span class="Object"> </span></span></span></div><div><span style="font-family:'courier new' , 'courier' , 'monaco' , monospace , sans-serif"><span style="font-size:12pt" lang="EN-GB"><span style="font-size:11pt" lang="EN-GB"><span class="Object">########################<br>dr.sc. Ivan Balog #<br>Institute of Physics #<br>Bijenička cesta 46, #<br>10000 Zagreb, Croatia #<br>phone: +385 1 469 8828 #<br>########################<br></span></span></span></span></div></div><br>_______________________________________________<br>https://www.phy.pmf.unizg.hr/cgi-bin/mailman/listinfo/seminar</div></div><br></div></div></body></html>