Graphene-metal Interaction Revealed by Scanning Tunneling Microscopy

DIPC Seminars

Speaker

Hyowon Kim, (Samsung Adv. Inst. of Technology (SAIT) , KOREA)

When

2015/03/16
13:00

Place

Donostia International Physics Center (DIPC). Paseo Manuel de Lardizabal, 4, Donostia

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Graphene-metal Interaction Revealed by Scanning Tunneling Microscopy Hyo Won Kim Samsung Advanced Institute of Technology, Suwon 443-803, Korea Graphene is a promising building block for future electronic devices but actualizing this enormous promise and realizing graphene-based devices requires a thorough understanding of how the contact between graphene and the underlying metal substrate affects the electronic properties of graphene. Metallic contacts to graphene are known to influence doping and can result in the opening of a band gap, which in turn significantly modifies the transport properties. The electronic properties of graphene on metal substrates also strongly depend on the nature of the graphene–metal interaction. Here, I present the graphene- metal interactions revealed by various scanning tunneling microscopic and spectroscopic studies such as the electron confinement in graphene nanoislands grown on a Pt(111) substrate [1], strong interaction between a graphene edge and the underlying metal [2], and the phonon excitations in graphene controlled by the interaction strength between the graphene and the underlying metal [3]. [1] H. W. Kim, et al. Electron Confinement in Graphene Nanoislands with Free- electron-like Energy Dispersion, to be submitted. [2] H. W. Kim, et al. Strong Interaction between Graphene edge and metal revealed by scanning tunneling microscopy, Carbon, 78, 190 (2014). [3] H. W. Kim, et al. Nanoscale Control of Phonon Excitations in Graphene, submitted. (host Nicolas Lorente)