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Topological edge and corner states and fractional corner charges in blue phosphorene
Tenta Tani, Masaru Hitomi, Takuto Kawakami +1
We theoretically study emergent edge and corner states in monolayer blue phosphorus (blue phosphorene) using the first-principles calculation and tight-binding model. We show that…
Topological invariants in two-dimensional quasicrystals
Mikito Koshino, Hiroki Oka
We study the topological characterization of the energy gaps in general two-dimensional quasiperiodic systems consisting of multiple periodicities, represented by twisted two-dimen…
Interlayer interactions in one-dimensional van der Waals moiré superlattices
Sihan Zhao, Ryo Kitaura, Pilkyung Moon +2
Different atomistic registry between the layers forming the inner and outer nanotubes can form one-dimensional (1D) van der Waals (vdW) moiré superlattices. Unlike the two-dimensio…
Fractal energy gaps and topological invariants in hBN/Graphene/hBN double moiré systems
Hiroki Oka, Mikito Koshino
We calculate the electronic structure in quasiperiodic double-moiré systems of graphene sandwiched by hexagonal boron nitride, and identify the topological invariants of energy gap…
Multiorbital edge and corner states in black phosphorene
Masaru Hitomi, Takuto Kawakami, Mikito Koshino
We theoretically study emergent edge/corner localized states in monolayer black phosphorene. Using the tight-binding model based on the density functional theory, we find that the…
Fractal defect states in the Hofstadter butterfly
Yoshiyuki Matsuki, Kazuki Ikeda, Mikito Koshino
We investigate the electronic properties in the Bloch electron on a square lattice with vacancies in the uniform magnetic field. We show that a single vacancy site introduced to th…