Naslov
Growth of graphene on a stepped iridium surface: morphology, domains and electronic fingerprints

Autori
Iva Šrut, Vesna Mikšić Tront, Petar Pervan, Fabian Craes, Thomas Michely, Carsten Busse, Marko Kralj

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Verhandlungen der Deutschen Physikalischen Gesellschaft / - , 2013, 393-393

Skup
DPG Spring Meeting of the Condensed matter section 2013

Mjesto i datum
Regensburg, Njemačka, 10.03.2013. - 15.03.2013

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
graphene; vicinal surfaces; electronic structure; morphology

Sažetak
A promising route for modification of graphene properties is the growth of graphene on a substrate with a periodic arrangement of steps. We have used scanning tunneling microscopy and spectroscopy (STM/STS) and low energy electron diffraction (LEED) to study the growth of graphene on such periodically stepped Ir(332) surface. We have found that graphene continuously extends over iridium terraces and steps. Moreover, new distinctive mesoscopic features of the underlying surface are formed involving large, flat terraces accompanied by groups of narrower steps [1]. These morphologically different regions are also distinctive by their spectroscopic features found in STS. The distribution of the newly formed terraces as well as the contribution of various graphene orientations is sensitive to the preparation temperature. Below 800°C we find that the terrace width distribution is closer to the intrinsic distribution of clean Ir(332) than for higher temperatures. Additionally, graphene grown at low temperatures has a prominent contribution of a domain rotated by 30° with respect to the substrate. We find that the microscopic shape of steps after graphene formation strongly depends on the orientation of graphene. [1] I. Šrut, et al., submitted

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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