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Moiré phonons in graphene/hexagonal boron nitride moiré superlattice
Lukas P. A. Krisna, Mikito Koshino
We theoretically study in-plane acoustic phonons of graphene/hexagonal boron nitride moiré superlattice by using a continuum model. We demonstrate that the original phonon bands of…
Spontaneous spin-valley polarization in NbSe2 at a van der Waals interface
Hideki Matsuoka, Tetsuro Habe, Yoshihiro Iwasa +2
A proximity effect at a van der Waals (vdW) interface enables creation of an emergent quantum electronic ground state. Here we demonstrate that an originally-superconducting two-di…
Perfect one-dimensional interface states in a twisted stack of three-dimensional topological insulators
Manato Fujimoto, Takuto Kawakami, Mikito Koshino
We theoretically study the electronic structure of interface states in twisted stacks of three-dimensional topological insulators. When the center of the surface Dirac cone is loca…
Moiré disorder effect in twisted bilayer graphene
Naoto Nakatsuji, Mikito Koshino
We theoretically study the electronic structure of magic-angle twisted bilayer graphene with disordered moiré patterns. By using an extended continuum model incorporating non-unifo…
Topological gap labeling with the third Chern numbers in three-dimensional quasicrystals
Kazuki Yamamoto, Mikito Koshino
We study the topological gap labeling of general 3D quasicrystals and we find that every gap in the spectrum is characterized by a set of the third Chern numbers. We show that a qu…