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Moiré edge states in twisted bilayer graphene and their topological relation to quantum pumping
Manato Fujimoto, Mikito Koshino
We study the edge states of twisted bilayer graphene and their topological origin. We show that the twisted bilayer graphene has special edge states associated with the moiré patte…
Dirac Fermion kinetics in three-dimensionally curved graphene
Yoichi Tanabe, Yoshikazu Ito, Katsuaki Sugawara +6
Three dimensionally curved graphene with a wide range of curvature radii from 25 nm to 1000 nm demonstrates that nano-scale curvature is a new degree of freedom to tune the transpo…
Electronic properties of graphyne- monolayer and its multilayer: even-odd effect and topological nodal line semimetalic phases
Takuto Kawakami, Takafumi Nomura, Mikito Koshino
We study the electronic structure and topological properties of monolayer and ABC-stacked multilayer of graphyne-, which are a family of planar carbon sheets consisting of …
Topological junction states and their crystalline network in chiral-symmetric systems: application to graphene nanoribbons
Gen Tamaki, Takuto Kawakami, Mikito Koshino
We develop a general theoretical framework based on -classification to count the number of topological bound states at a junction of chiral-symmetric one-dimensional systems. Th…
Hofstadter butterfly and the quantum Hall effect in twisted double bilayer graphenes
J. A. Crosse, Naoto Nakatsuji, Mikito Koshino +1
We study the energy spectrum and quantum Hall effects of the twisted double bilayer graphene in uniform magnetic field. We investigate two different arrangements, AB-AB and AB-BA,…
Perfect one-dimensional chiral states in biased twisted bilayer graphene
Bonnie Tsim, Nguyen N. T. Nam, Mikito Koshino
We theoretically study the electronic structure of small-angle twisted bilayer graphene with a large potential asymmetry between the top and bottom layers. We show that the emergen…