[1/27] The 8th WPI-AIMR Joint Seminar in FY2016
The 8th WPI-AIMR Joint Seminar in FY2016
Nanoscale edge effects on graphene and related materials
Prof. Katsunori Wakabayashi
(School of Science and Technology, Kwansei Gakuin University)
January 27 (Fri.), 2016 14:30-15:30
Seminar Room, 2nd floor, WPI-AIMR Main Bldg.
Electronic states of graphene are well described as massless Dirac fermion. The presence of edges, however, makes strong implications for the spectrum of the electrons. As first, I will briefly give overview of edge and nanoscale effects on magnetic and transport properties of graphene nanostructures . It is known that edge states can induce spin-polarization with ferromagnetic correlation along the zigzag edges. Our recent many-body analysis shows that the system becomes metallic and magnetic ground states by hole doping . Graphene nanoribbons can possess a perfectly conducting channel when the intervalley scattering is sufficiently suppressed. The mechanism is owing to the breaking of pseudo-time reversal symmetry . We will discuss the possible formation mechanism of quasi-bound states in graphene quantum point contacts . In further, we also discuss our recent work on electronic properties of carbon nanotubes under circularly polarized light, which show the valley polarization of electrons .
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- . Liu, Y. Nakajima, K. Wakabayashi, Appl. Phys. Exp. 9, 085101 (2016).
International Affairs Center (IAC), AIMR
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