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Bibliographic record number: 835755

Journal

Authors: Šrut Rakić, Iva; Kralj, Marko; Jolie, Wouter; Lazić, Predrag; Sun, Wenhao; Avila, Hose; Asensio, Maria-Carmen; Craes, Fabian; Mikšić Trontl, Vesna; Busse, Carsten; Pervan, Petar
Title: Step-induced faceting and related electronic effects for graphene on Ir(332)
( Step-induced faceting and related electronic effects for graphene on Ir(332) )
Source: Carbon (0008-6223) 110 (2016); 267-277
Paper type: article
Keywords: graphene ; stepped surface ; electronic properties ; angle-resolved photoemission spectroscopy ; scanning tunneling microscopy
( graphene ; stepped surface ; electronic properties ; angle-resolved photoemission spectroscopy ; scanning tunneling microscopy )
Abstract:
Modifications of graphene's electronic band structure can be achieved through periodic bending strain and related potential in samples grown on stepped substrates, opening a viable route to implement the periodicity effects in this ultimate two-dimensional (2D) material. We studied graphene grown on stepped Ir(332), which can be benchmarked to a well-known graphene on flat Ir(111) recognized for a weak van der Waals (vdW) interaction. The structural characterization indicated that graphene growth induces reversible, well defined faceting of iridium surface into alternating terraces and step bunches, while spectroscopy techniques revealed substantial changes of graphene's electronic structure. Crucially, highly concentrated Ir step edges, resulting in locally strong chemical bonding of graphene, introduce a dominant energy parameter which overwhelms the induced strain and presents a driving force for the surface faceting. This sets a general framework for the understanding of graphene mediated faceting of stepped substrates whenever the corresponding low index surface exhibits dominantly vdW interaction with graphene, which can be also supplemented to other 2D materials. Interestingly, the graphene p band becomes pronouncedly anisotropic due to the presence of a periodic potential originating from steps, and lateral variation of the charge carrier concentration enabling a straightforward electronic band engineering in graphene.
Project / theme: HRZZ-IP-2013-11-2727, EK-H2020-692194, DAAD-MZOŠ (2D materials with novel properties), UKF (22/15)
Original language: eng
Citation databases: Current Contents Connect (CCC)
Scopus
SCI-EXP, SSCI i/ili A&HCI
Science Citation Index Expanded (SCI-EXP) (sastavni dio Web of Science Core Collectiona)
Category: Znanstveni
Research fields:
Physics
URL: http://www.sciencedirect.com/science/article/pii/S0008622316307758
http://dx.doi.org/10.1016/j.carbon.2016.09.024
Broj citata:
Altmetric:
DOI: 10.1016/j.carbon.2016.09.024
URL cjelovitog rada:
Google Scholar: Step-induced faceting and related electronic effects for graphene on Ir(332)
Contrib. to CROSBI by: Marko Kralj (mkralj@ifs.hr), 30. Ruj. 2016. u 15:11 sati



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