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Speaker-Stephan Roche

Stephan Roche
ICN2, Spain

Stephan Roche is ICREA Research Professor, head of the Theoretical and Computational Nanoscience Group of Catalan Institute of Nanoscience and Nanotechnology (ICN2). He is a theoretical physicist expert in quantum transport and in the development of computational modelling of nanomaterials and devices. His expertise includes the development of order N quantum transport (Kubo and Landauer-Büttiker conductances), with which he has pioneered mesoscopic transport studies in chemically disordered graphene-based materials and devices. He has a deep experience in developing advanced simulation tools in the context of industrial research, with collaborations including large companies such as NEC, ST Microelectronics, and SAMSUNG. He is co-supervising the GRAPHENE SPINTRONICS Work package within the Graphene Flagship project.

Title：Fundamentals of Charge Transport in Large-Scale Polycrystalline graphene and hybrids
SymposiumA01 Frontier Preparation Technology
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Abstract

In this talk, I will discuss how charge transport properties can be evaluated in highly complex forms of graphene-based materials (chemically reduced, polycrystalline graphene, chemically functionalized, hybrid hBN-graphene) of relevance for large-scale industrial production and applications in flexible electronics, energy harvesting and spintronics. The crucial contribution of multiscale simulation will be illustrated, demonstrating an achieved high level of predictive capability for very large system sizes (with up to 1 billion atoms), reaching the experimental and technology scales.
The main illustration will be the quantitative analysis on the transport (electric and thermal) properties of structural imperfections produced during the wafer-scale production of graphene through chemical growth (CVD), or the mechanical/chemical exfoliation and chemical transfer to versatile substrates, followed by the device fabrication. Fundamental properties of charge mobilities in polycrystalline graphene, accounting the variability in average grain sizes and chemical reactivity of grain boundaries as observed in real samples grown by CVD will be presented, together with their relevance for device optimization and diversification of applied functionalities such as chemical sensing.

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E-mail: meeting@c-gia.org

Abstract: Minyang Lu

Sponsor: Wenyang Yang

Media: Liping Wang

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