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Landau quantization in coupled Weyl points: a case study of semimetal NbP
Y. Jiang, Z. L. Dun, S. Moon +4
Weyl semimetal (WSM) is a newly discovered quantum phase of matter that exhibits topologically protected states characterized by two separated Weyl points with linear dispersion in…
Dynamical conductivity in topological nodal-line semimetal ZrSiS
Tetsuro Habe, Mikito Koshino
ZrSiS is one of the strong candidates for realistic nodal-line semimetal. We theoretically investigate the dynamical conductivity in ZrSiS by using a multi-orbital theoretical mode…
Possible correlated insulating states in magic-angle twisted bilayer graphene under strongly competing interactions
Masayuki Ochi, Mikito Koshino, Kazuhiko Kuroki
We investigate correlated insulating states in magic-angle twisted bilayer graphene (TBG) by the exact diagonalization method applied to the extended Hubbard model with interaction…
Maximally-localized Wannier orbitals and the extended Hubbard model for the twisted bilayer graphene
Mikito Koshino, Noah F. Q. Yuan, Takashi Koretsune +3
We develop an effective extended Hubbard model to describe the low-energy electronic properties of the twisted bilayer graphene. By using the Bloch states in the effective continuu…
Dirac Electrons in a Dodecagonal Graphene Quasicrystal
Sung Joon Ahn, Pilkyung Moon, Tae-Hoon Kim +10
Quantum states of quasiparticles in solids are dictated by symmetry. Thus, a discovery of unconventional symmetry can provide a new opportunity to reach a novel quantum state. Rece…
Three-dimensional graphdiyne as a topological nodal-line semimetal
Takafumi Nomura, Tetsuro Habe, Ryota Sakamoto +1
We study the electronic band structure of three-dimensional ABC-stacked (rhombohedral) graphdiyne, which is a new planar carbon allotrope recently fabricated. Using the first-princ…