Transfer characteristics in graphene field-effect transistors with Co contacts

Nouchi, Ryo; Shiraishi, Masashi; Suzuki, Yoshishige
October 2008
Applied Physics Letters;10/13/2008, Vol. 93 Issue 15, p152104
Academic Journal
Graphene field-effect transistors with Co contacts as source and drain electrodes show anomalous distorted transfer characteristics. The anomaly appears only in short-channel devices (shorter than approximately 3 μm) and originates from a contact-induced effect. Band alteration of a graphene channel by the contacts is discussed as a possible mechanism for the anomalous characteristics observed.


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