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O: Fachverband Oberflächenphysik

O 14: Graphene II: Excitations and Nanoribbons (joint session O/TT)

O 14.5: Vortrag

Montag, 1. April 2019, 16:00–16:15, H24

Edge State Engineering of Graphene Nanoribbons — •Ping Yu — School of Physical Science and Technology, ShanghaiTech University

Zigzag edges of graphene nanoribbons are predicted to be spin-polarized and could have great potential for spintronics. The ability to precisely engineer the zigzag edge state is of crucial importance for realizing its full potential functionalities in device nanotechnology. Here, by combining scanning tunneling microscopy and atomic force microscopy, the zigzag edge states are found to get energy splitting upon fusing manganese phthalocyanine molecule with the short armchair graphene nanoribbon termini. Moreover, the edge state splitting can be reversibly switched by adsorption and desorption of atom hydrogen on the magnetic core of manganese phthalocyanine. The engineering mechanism is found to be due to the zigzag edge local doping level by the charge transfer process, which provides a new route to functionalize graphene-based molecular devices.