Search Results - "Hatsugai, Y."

Bulk-edge correspondence in graphene with/without magnetic field: Chiral symmetry, Dirac fermions and edge states by Hatsugai, Y.

“…There are two types of edge states in graphene with/without magnetic field. One is a quantum Hall edge state, which is topologically protected against small…”
Get full text

Molecular-orbital representation of generic flat-band models by Mizoguchi, T., Hatsugai, Y.

“…We develop a framework to describe a wide class of flat-band models, with and without a translational symmetry, by using "molecular orbitals" introduced in a…”
Get full text

ZQ topological invariants for Polyacetylene, Kagome and Pyrochlore lattices by Hatsugai, Y, Maruyama, I

“…Adiabatic ZQ invariants by quantized Berry phases are defined for gapped electronic systems in d-dimensions (Q=d+1). This series includes Polyacetylene, Kagome…”
Get full text

Flat bands in the Weaire-Thorpe model and silicene by Hatsugai, Y, Shiraishi, K, Aoki, H

“…In order to analytically capture and identify peculiarities in the electronic structure of silicene, the Weaire-Thorpe (WT) model, a standard model for…”
Get full text

Chiral symmetry and its manifestation in optical responses in graphene: interaction and multilayers by Hatsugai, Y, Morimoto, T, Kawarabayashi, T, Hamamoto, Y, Aoki, H

“…Chiral symmetry, fundamental in the physics of graphene, guarantees the existence of topologically stable doubled Dirac cones and anomalous behaviors of the…”
Get full text

Landau level broadening in graphene with long-range disorder—Robustness of the n = 0 level by Kawarabayashi, T., Hatsugai, Y., Aoki, H.

“…Broadening of the Landau levels in graphene and the associated quantum Hall plateau-to-plateau transition are investigated numerically. For correlated bond…”
Get full text

Sum Rule of Hall Conductance in a Random Quantum Phase Transition by Hatsugai, Y., Ishibashi, K., Morita, Y.

Get full text

Topological aspects of graphene: Dirac fermions and the bulk-edge correspondence in magnetic fields by Hatsugai, Y., Fukui, T., Aoki, H.

“…Topological aspects of the electronic properties of graphene, including edge effects, with the tight-binding model on a honeycomb lattice and its extensions to…”
Get full text

Quasiparticle structure in the vicinity of the Heisenberg model in one and higher dimensions by MORITA, Y, HATSUGAI, Y, OTSUKA, Y

Get full text

Entanglement entropy and the Berry phase in the solid state by Ryu, S., Hatsugai, Y.

Get full text

Duality in the Azbel-Hofstadter Problem and Two-Dimensional d-Wave Superconductivity with a Magnetic Field by Morita, Y, Hatsugai, Y

“…A single-parameter family of the lattice-fermion model is constructed. It is a deformation of the Azbel-Hofstadter problem by a parameter h = Delta/t (quantum…”
Get full text

Near Critical States of Random Dirac Fermions by Morita, Y., Hatsugai, Y.

Get full text

Topological classification of gapped spin chains: Quantized Berry phase as a local order parameter by Hirano, T., Katsura, H., Hatsugai, Y.

Get full text

Superconductivity and Abelian chiral anomalies by Hatsugai, Y., Ryu, S., Kohmoto, M.

Get full text

Topological description of (spin) Hall conductances on Brillouin zone lattices: quantum phase transitions and topological changes by Hatsugai, Y., Fukui, T., Suzuki, H.

“…It is widely accepted that topological quantities are useful to describe quantum liquids in low dimensions. The (spin) Hall conductances are typical examples…”
Get full text

Fermi surface of the periodic Anderson model detected by momentum-resolved charge compressibility by Otsuka, Y., Hatsugai, Y.

“…We investigate a Fermi surface of the periodic Anderson model by the finite temperature quantum Monte Carlo method. Although the Luttinger sum rule predicts…”
Get full text

Chern number and edge states in the integer quantum hall effect by HATSUGAI, Y

Get full text

Topological origin of zero-energy edge states in particle-hole symmetric systems by Ryu, Shinsei, Hatsugai, Yasuhiro

“…A criterion to determine the existence of zero-energy edge states is discussed for a class of particle-hole symmetric Hamiltonians. A "loop" in a parameter…”
Get full text

Chern numbers in discretized brillouin zone : Efficient method of computing (spin) hall conductances by FUKUI, Takahiro, HATSUGAI, Yasuhiro, SUZUKI, Hiroshi

Get full text

Breakdown of the IQHE and the selection rule by Morita, Y, Hatsugai, Y

“…Transitions between the quantum Hall state and the Anderson insulator are studied in a two-dimensional tight-binding model with a uniform magnetic field and a…”
Get full text