Poster (Scientific congresses, symposiums and conference proceedings)
Electronic and Vibrational proprieties of graphene on Ir(111) and SiC(100)
Pereira Coutada Miranda, Henrique; Molina-Sanchez, Alejandro; Wirtz, Ludger
2015PSI-K - 2015 Conference
 

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Abstract :
[en] In the last years, graphene has become one of the most studied materials due to its peculiar electronic, optical, thermal, and mechanical properties. It is thus of major importance, for practical applications, to study how the electronic and vibrational proprieties of graphene change when deposited on a substrate. The non-commensurability of the unit cell of graphene with the substrate leads to the formation of Moiré patterns with accordingly large supercell sizes. Ab-initio calculations using standard plane-wave based codes on these large systems are of high computational cost even for the ground-state calculations. We show the effect that such Moiré patterns have on the band structure by projecting the resulting electronic structure and phonon dispersion onto the unit cell of free-standing graphene with an unfolding scheme. We compare our results with HREELS measurements of the phonon dispersion of graphene on Ir(111). The accurate knowledge of the interaction graphene-substrate will provide important information for future applications of graphene on electronic devices. Work performed in collaboration with the experimental groups of J. Kroeger (TU Ilmenau, Germany) and T. Seyller (TU Chemnitz, Germany).
Research center :
ULHPC - University of Luxembourg: High Performance Computing
Disciplines :
Physics
Author, co-author :
Pereira Coutada Miranda, Henrique ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Molina-Sanchez, Alejandro ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Wirtz, Ludger ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
External co-authors :
no
Language :
English
Title :
Electronic and Vibrational proprieties of graphene on Ir(111) and SiC(100)
Publication date :
September 2015
Event name :
PSI-K - 2015 Conference
Event date :
6-09-2015 to 10-09-2015
FnR Project :
FNR6010221 - Optical And Transport Properties Of Mos2 In The Presence Of Defects, 2013 (01/10/2013-30/09/2017) - Henrique Miranda
Funders :
FNR - Fonds National de la Recherche [LU]
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since 24 November 2015

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