Theoretical Study on Electronic and Spintronic Properties of Nano-Carbon Topology Material

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In this research program, we have focused the effect of impurity, edge shape and magnetic field on the electronic transport properties of graphene nanoribbons using numerical and analytic techniques. It was shown that the physical quantities characterizing the electronic transport such as conductance and its fluctuation crucially depend on the edge shape and chirality of graphene nanoribbons. Also, we have found that disordered zigzag nanoribbon with long-ranged impurities whose range is larger than the lattice constant possesses a perfectly conducting channel, i.e. absence of Anderson localization in spite of the quasi-one dimensional systems.