Aug 28 – 31, 2018
EPFL
Europe/Zurich timezone

【809】 Edge states in graphene: spin polarization and how to protect them

Aug 29, 2018, 3:45 PM
15m
CE 1 (EPFL)

CE 1

EPFL

Talk Magnetism and Spintronics at the Nanoscale Magnetism and Spintronics at the Nanoscale

Speaker

Mr Amogh Kinikar (nanotech@surfaces Laboratory, Empa – Dübendorf, Switzerland)

Description

Zigzag graphene nanoribbons (ZGNRs) have attracted considerable interest due to the unique edge states they host. We recently established an on-surface synthesis approach to synthesize atomically precise 6-ZGNRs using a carefully designed precursor monomer. Furthermore, our recent experiments on exfoliated graphene nano-constrictions provide the first evidence through ballistic electron transport measurements that the edge states are spin polarized. To exploit these properties in devices we need to have ZGNRs on suitable substrates, this has been not yet achieved as the ZGNRs are extremely reactive. With the goal of passivating these edges in UHV to facilitate their transfer to ambient conditions, we present first results of how morphology and electronic properties of 6-ZGNRs change when exposed to reactive gases.

Primary authors

Mr Amogh Kinikar (nanotech@surfaces Laboratory, Empa – Dübendorf, Switzerland) Dr Marco Di Giovannantonio (nanotech@surfaces Laboratory, Empa – Dübendorf, Switzerland) Dr T Phanindra Sai (Department of Physics, Indian Institute of Science) Prof. Arindam Ghosh (Department of Physics, Indian Institute of Science) Dr Pascal Ruffieux (nanotech@surfaces Laboratory, Empa – Dübendorf, Switzerland) Prof. Roman Fasel (nanotech@surfaces Laboratory, Empa – Dübendorf, Switzerland)

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