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Since its discovery, graphene has become a very interesting material for the application in a variety of fields, such as photonics, plasmonics, spintronics or nanoelectronics. It is attracting ever growing interest due to its remarkable properties which have origin in graphene’s crystal and electronic structure. The electronic structure of graphene was resolved in angular-resolved photoemission (ARPES) experiments and its most characteristic feature is a Dirac cone. The Dirac cone could be modified in interaction with the substrate by charge carriers doping or by structural modification. We have studied a periodically modulated graphene grown on Ir(332) substrate where graphene growth induces reversible, well defined faceting of iridium surface into alternating terraces and step bunches which we investigated in scanning tunneling microscopy (STM) experiments [1][2]. Measurements of the electronic band structure by ARPES showed the Dirac cone anisotropy which was attributed to the 1D periodicity present in the system and lateral variation of the charge carrier concentration (on terraces and step bunches) [2]. [1] Šrut, Iva ; Mikšić Trontl, Vesna ; Pervan, Petar ; Kralj, Marko ; Temperature dependence of graphene growth on a stepped iridium surface.// Carbon 56 (2013) ; 193-200 [2] Iva Šrut Rakić, Marko Kralj, Wouter Jolie, Predrag Lazić, Wenhao Sun, José Avila, Maria- Carmen Asensio, Fabian Craes, Vesna Mikšić Trontl, Carsten Busse, and Petar Pervan ; Step-induced faceting and related electronic effects for graphene on Ir(332) // Carbon 110, (2016) 267-277 |
