30 citations · 59 across the 9 of their papers we have counts for
9 papers
Kitaev Meets Affleck-Kennedy-Lieb-Tasaki: Competing Quantum Disorder in Spin-3/2 Honeycomb Systems
Sogen Ikegami, Kiyu Fukui, Rico Pohle +1
We investigate an S=3/2 quantum spin model on a two-dimensional honeycomb lattice that continuously interpolates between two paradigmatic quantum disordered states with distinct en…
Topological transition induced by selective random defects on a honeycomb lattice
Sogen Ikegami, Kiyu Fukui, Shun Okumura +2
We investigate how the spectral and topological properties of electron systems evolve on a lattice that interpolates between the honeycomb and its 1/6-depleted structures through t…
Topological Majorana flat bands in the Kitaev model on a Bishamon-kikko lattice
Kiyu Fukui, Yukitoshi Motome
We unveil an interesting example of topological flat bands of Majorana fermions in quantum spin liquids. We study the Kitaev model on a periodically depleted honeycomb lattice, und…
Topological phase diagram of the Haldane model on a Bishamon-kikko--honeycomb lattice
Sogen Ikegami, Kiyu Fukui, Shun Okumura +2
Topological flat bands have gained extensive interest as a platform for exploring the interplay between nontrivial band topology and correlation effects. In recent studies, strongl…
Magnetic field effects on the Kitaev model coupled to environment
Kiyu Fukui, Yasuyuki Kato, Yukitoshi Motome
Open quantum systems display unusual phenomena not seen in closed systems, such as new topological phases and unconventional phase transitions. An interesting example was studied f…
Ground-State Phase Diagram of the Kitaev-Heisenberg Model on a Three-dimensional Hyperhoneycomb Lattice
Kiyu Fukui, Yasuyuki Kato, Yukitoshi Motome
The Kitaev model, which hosts a quantum spin liquid (QSL) in the ground state, was originally defined on a two-dimensional honeycomb lattice, but can be straightforwardly extended…
Ground-state phase diagram of spin- Kitaev-Heisenberg models
Kiyu Fukui, Yasuyuki Kato, Joji Nasu +1
The Kitaev model, whose ground state is a quantum spin liquid (QSL), was originally conceived for spin moments on a honeycomb lattice. In recent years, the model has been e…
Feasibility of Kitaev quantum spin liquids in ultracold polar molecules
Kiyu Fukui, Yasuyuki Kato, Joji Nasu +1
Ultracold atoms and molecules trapped in optical lattices are expected to serve as simulators of strongly correlated systems and topological states of matter. A fascinating example…
Mixing of odd- and even-frequency pairings in strongly correlated electron systems under magnetic field
Kiyu Fukui, Yusuke Kato
Even- and odd-frequency superconductivity coexist due to broken time-reversal symmetry under magnetic field. In order to describe this mixing, we extend the linearized Eliashberg e…