Fano Resonance Effect in CO-Adsorbed Zigzag Graphene Nanoribbons
Gao Wang1, Meng-Qiu Long2**, Dan Zhang2,3
1Advanced Research Center, Central South University, Changsha 410083 2Institute of Super Microstructure and Ultrafast Process, Central South University, Changsha 410083 3School of Science, Hunan University of Technology, Zhuzhou 412007
Abstract：Quantum interference plays an important role in tuning the transport property of nano-devices. Using the non-equilibrium Green's Function method in combination with density functional theory, we investigate the influence to the transport property of a CO molecule adsorbed on one edge of a zigzag graphene nanoribbon device. Our results show that the CO molecule-adsorbed zigzag graphene nanoribbon devices can exhibit the Fano resonance phenomenon. Moreover, the distance between CO molecules and zigzag graphene nanoribbons is closely related to the energy sites of the Fano resonance. Our theoretical analyses indicate that the Fano resonance would be attributed to the interaction between CO molecules and the edge of the zigzag graphene nanoribbon device, which results in the localization of electrons and significantly changes the transmission spectrum.
2017, Vol. 34 
