Publications (53)
Topologically protected Landau levels in bilayer graphene in finite electric fields
Tohru Kawarabayashi, Yasuhiro Hatsugai, Hideo Aoki
Interacting Electron Wave Packet Dynamics in a Two-dimensional Nanochannel
Christoph M. Puetter, Satoru Konabe, Yasuhiro Hatsugai +2
Topological aspect of graphene physics
Yasuhiro Hatsugai
Gap Opening Transition and Fractal Ground State Phase Diagram in One Dimensional Fermions with Long Range Interaction : Mott Transition as a Quantum Phase Transition of Infinite Order
Yasuhiro Hatsugai
Chern Numbers in Discretized Brillouin Zone: Efficient Method of Computing (Spin) Hall Conductances
Takahiro Fukui, Yasuhiro Hatsugai, Hiroshi Suzuki
Numerical Replica Limit for the Density Correlation of the Random Dirac Fermion
Shinsei Ryu, Yasuhiro Hatsugai
Singular Density of States of Disordered Dirac Fermions in the Chiral Models
Shinsei Ryu, Yasuhiro Hatsugai
Degeneracy and Consistency Condition of Berry phases: Gap Closing under the Twist
Takaaki Hirano, Hosho Katsura, Yasuhiro Hatsugai
Optical Hall conductivity in 2DEG and graphene QHE systems
Takahiro Morimoto, Yasuhiro Hatsugai, Hideo Aoki
Semiclassical Klein Tunneling and Valley Hall Effect in Graphene
Christoph. M. Puetter, Satoru Konabe, Yasuhiro Tokura +2
Edge states for the n=0 Laudau level in graphene
Mitsuhiro Arikawa, Yasuhiro Hatsugai, Hideo Aoki
Survival of sharp $n=0$ Landau levels in massive tilted Dirac fermions: Protection by generalized chiral operator
Yasuhiro Hatsugai, Tohru Kawarabayashi, Hideo Aoki
Zero-energy edge states and chiral symmetry breaking at edges of graphite sheets
Shinsei Ryu, Yasuhiro Hatsugai
Disordered Critical Wave functions in Random Bond Models in Two Dimensions -- Random Lattice Fermions at $E=0$ without Doubling
Yasuhiro Hatsugai, Xiao-Gang Wen, Mahito Kohmoto
Topological Aspects of Surface States in Semiconductors
Yoshihiro Kuge, Isao Maruyama, Yasuhiro Hatsugai
Polarization as a topological quantum number in graphene
Hideo Aoki, Yasuhiro Hatsugai
Fractionally Quantized Berry Phase, Adiabatic Continuation, and Edge States
Toshikaze Kariyado, Yasuhiro Hatsugai
Exact ground-state correlation functions of the one-dimensional strongly correlated electron models with the resonating-valence-bond ground state
Masanori Yamanaka, Shinsuke Honjo, Yasuhiro Hatsugai +1
Numerical study of quantum Hall effect in two-dimensional multi-band system: single- and multi-layer graphene
Masao Arai, Yasuhiro Hatsugai
Exact Analysis of Entanglement in Gapped Quantum Spin Chains
Hosho Katsura, Takaaki Hirano, Yasuhiro Hatsugai
Spin-resoloved chiral condensate as a spin-unpolarized ν=0 quantum Hall state in graphene
Yuji Hamamoto, Tohru Kawarabayashi, Hideo Aoki +1
Topological Origin of Zero-Energy Edge States in Particle-Hole Symmetric Systems
Shinsei Ryu, Yasuhiro Hatsugai
Generalization of Chiral Symmetry for Tilted Dirac Cones
Tohru Kawarabayashi, Yasuhiro Hatsugai, Takahiro Morimoto +1
Topological Quantum Phase Transitions in Superconductivity on Lattices
Yasuhiro Hatsugai, Shinsei Ryu
Symmetry Protected Quantization and Bulk-Edge Correspondence of Massless Dirac Fermions: Application to Fermionic Shastry-Sutherland Model
Toshikaze Kariyado, Yasuhiro Hatsugai
Edge states in graphene in magnetic fields -- a speciality of the edge mode embedded in the n=0 Landau band
Mitsuhiro Arikawa, Yasuhiro Hatsugai, Hideo Aoki
Optical Hall conductivity in ordinary and graphene QHE systems
Takahiro Morimoto, Yasuhiro Hatsugai, Hideo Aoki
Generalized Chiral Symmetry and Stability of Zero Modes for Tilted Dirac Cones
Tohru Kawarabayashi, Yasuhiro Hatsugai, Takahiro Morimoto +1
Entanglement Entropy of One-dimensional Gapped Spin Chains
Takaaki Hirano, Yasuhiro Hatsugai
Stability of zero-mode Landau levels in bilayer graphene against disorder in the presence of the trigonal warping
Tohru Kawarabayashi, Yasuhiro Hatsugai, Hideo Aoki
Chiral condensate with topological degeneracy in graphene and its manifestation in edge states
Yuji Hamamoto, Hideo Aoki, Yasuhiro Hatsugai
Topological Classification of Gapped Spin Chains :Quantized Berry Phase as a Local Order Parameter
Takaaki Hirano, Hosho Katsura, Yasuhiro Hatsugai
Quantum Hall plateau transition in graphene with spatially correlated random hopping
Tohru Kawarabayashi, Yasuhiro Hatsugai, Hideo Aoki
Correlation effects of carbon nanotubes at boundaries: Spin polarization induced by zero-energy boundary states
Shinsei Ryu, Yasuhiro Hatsugai
Edge states of Spin-1/2 Two-Leg Ladder with Four-Spin Ring Exchange
Mitsuhiro Arikawa, Shou Tanaya, Isao Maruyama +1
Hidden Massive Spectators in the Effective Field Theory for Integral Quantum Hall Transitions
Yasuhiro Hatsugai, Mahito Kohmoto, Yong-Shi Wu
Z$_2$ topological number of local quantum clusters in the orthogonal dimer model
Isao Maruyama, Sho Tanaya, Mitsuhiro Arikawa +1
Characterizing the weak topological properties: Berry phase point of view
Yukinori Yoshimura, Ken-Ichiro Imura, Takahiro Fukui +1
Explicit Gauge Fixing for Degenerate Multiplets: A Generic Setup for Topological Orders
Yasuhiro Hatsugai
Landau level broadening in graphene with long-range disorder -- Robustness of the n=0 level
Tohru Kawarabayashi, Yasuhiro Hatsugai, Hideo Aoki
A Characterization of Topological Insulators: Chern Numbers for a Ground State Multiplet
Yasuhiro Hatsugai
Levitation and percolation in quantum Hall systems with correlated disorder
Hui Song, Isao Maruyama, Yasuhiro Hatsugai
Nontrivial quantized Berry phases for itinerant spin liquids
Isao Maruyama, Yasuhiro Hatsugai
Conductivity of 2D lattice electrons in an incommensurate magnetic field
Masahito Takahashi, Yasuhiro Hatsugai, Mahito Kohmoto
Quantum Coherence of Edge States in the Quantum Hall Effect -- Topological Invariants and Edge State Mixing --
Yasuhiro Hatsugai
Chiral Symmetry and Many-Body Effect in Multilayer Graphene
Yuji Hamamoto, Tohru Kawarabayashi, Hideo Aoki +1
U(1) symmetry breaking in one-dimensional Mott insulator studied by the Density Matrix Renormalization Group method
Isao Maruyama, Tetsuji Koide, Yasuhiro Hatsugai
Anomalous criticality in the quantum Hall transition at $n=0$ Landau level of graphene with chiral-symmetric disorders
Tohru Kawarabayashi, Takahiro Morimoto, Yasuhiro Hatsugai +1
Topological low-energy modes in N=0 Landau levels of graphene: a possibility of a quantum-liquid ground state
Yasuhiro Hatsugai, Takahiro Fukui, Hideo Aoki
Explicit Solutions of the Bethe Ansatz Equations for Bloch Electrons in a Magnetic Field
Yasuhiro Hatsugai, Mahito Kohmoto, Yong-Shi Wu
Half-integer contributions to the quantum Hall conductivity from single Dirac cones
Haruki Watanabe, Yasuhiro Hatsugai, Hideo Aoki
Cyclotron radiation and emission in graphene
Takahiro Morimoto, Yasuhiro Hatsugai, Hideo Aoki
Topological quantum phase transition in the BEC-BCS crossover phenomena
Mitsuhiro Arikawa, Isao Maruyama, Yasuhiro Hatsugai