23 citations · 179 across the 35 of their papers we have counts for
25 papers · 1 filter
Meissner effect in the layered Kane-Mele model with Hubbard interaction
Jun Goryo, Nobuki Maeda
We investigate the magnetic response in the quantum spin Hall phase of the layered Kane-Mele model with Hubbard interaction, and argue a condition to obtain the Meissner effect. Th…
(De)confinement of supercurrent in Z_2 Topological Insulators
Jun Goryo, Nobuki Maeda, Ken-Ichiro Imura
It is shown that the electric supercurrent flows in a Z_2 topological insulator with U_em(1) X U_z(1) (electromagnetic and spin) gauge symmetries. When U_z(1) is broken, a dissipat…
Current induced transition of anisotropic quantum Hall states
Kazumi Tsuda, Nobuki Maeda, Kenzo Ishikawa
We compare the energies of the striped Hall state and the anisotropic charge density wave (ACDW) state at half-filled third and higher Landau levels in the system with injected cur…
Induced Chern-Simons term of a paired electron state in the quantum Hall system
T. Aoyama, N. Maeda
The induced Chern-Simons term for a paired electron state is calculated in the quantum Hall system by using a field theory on the von Neumann lattice. The coefficient of the Chern-…
Photon energy absorption rate of a striped Hall gas
Y. Ishizuka, T. Aoyama, N. Maeda +1
Using symmetries of the current correlation function, we analyze the frequency dependence of the photon energy absorption rate of a striped Hall gas. Since the magnetic translation…
Intra-Landau level polarization effect for a striped Hall gas
T. Aoyama, K. Ishikawa, Y. Ishizuka +1
We calculate the polarization function including only intra-Landau level correlation effects of striped Hall gas. Using the polarization function, the dielectric function, the disp…
Field Theory of Anisotropic Quantum Hall Gas: Metrology and a Novel Quantum Hall Regime
K. Ishikawa, T. Aoyama, Y. Ishizuka +1
The von Neumann lattice representation is a convenient representation for studying several intriguing physics of quantum Hall systems. In this formalism, electrons are mapped to la…
Theory of Striped Hall Ferromagnets
Nobuki Maeda
We study spin and charge striped states at the half-filled high Landau level in the zero Zeeman energy limit using a Hartree-Fock approximation. It is shown that a ferromagnetic st…
Energy Spectrum for Neutral Collective Excitations in Striped Hall States
N. Maeda, T. Aoyama, Y. Ishizuka +1
Neutral collective excitations in the striped Hall state are studied by using the single mode approximation and Hartree-Fock approximation at the half-filled third and fourth Landa…
Optimal orientation of striped states in the quantum Hall system against external modulations (in 26th ICPS proceedings)
T. Aoyama, K. Ishikawa, N. Maeda
The physical properties of striped Hall state in the presence of an external unidirectional periodic potential is investigated. The study of searching the optimal orientation of th…
Neutral Collective Excitations in Striped Hall States
N. Maeda, T. Aoyama, Y. Ishizuka +1
In the striped Hall state, a magnetic translation in one direction is spontaneously broken to the discrete translation. The spectrum of the neutral collective excitation is obtaine…
Energy Spectrum of Neutral Collective Excitations in Striped Hall States
T. Aoyama, K. Ishikawa, Y. Ishizuka +1
We investigate neutral collective excitations in the striped Hall state. In the striped Hall state, the magnetic translation and rotation symmetries are spontaneously broken. Using…
Optimal orientation of striped states in the quantum Hall system against external modulations
T. Aoyama, K. Ishikawa, N. Maeda
We study striped states in the quantum Hall system around half-filled high Landau levels and obtain the optimal orientation of the striped state in the presence of an external unid…
Unusual Properties of Anisotropic Hall Gas: Implication to Metrology of the Integer Quantum Hall Effect
K. Ishikawa, N. Maeda
Physical properties of anisotropic compressible quantum Hall states and their implications to integer quantum Hall effect are studied based on a mean field theory on the von Neuman…
Pressure, Resistance, and Current Activation of Anisotropic Compressible Hall States
K. Ishikawa, N. Maeda
Thermodynamic and electric properties of anisotropic compressible Hall states at higher Landau levels are studied using a mean field theory on the von Neumann lattice basis. It is…
Paired and Stripe States in the Quantum Hall System
Nobuki Maeda
We study a paired state at the half-filled Landau level using a mean field theory on the von Neumann lattice. We obtain a microscopic model which shows a continuous transition from…
Effective Hamiltonian for striped and paired states at the half-filled Landau level
Nobuki Maeda
We study a pairing mechanism for the quantum Hall system using a mean field theory with a basis on the von Neumann lattice, on which the magnetic translations commute. In the Hartr…
Negative Pressure of Anisotropic Compressible Hall States : Implication to Metrology
K. Ishikawa, N. Maeda
Pressure, compressibility, and Hall conductance of anisotropic states at higher Landau levels are computed. Pressure and compressibility become negative. Hall conductance is unquan…
Anisotropy in the Compressible Quantum Hall State
Nobuki Maeda
Using a mean field theory on the von Neumann lattice, we study compressible anisotropic states around in the quantum Hall system. The Hartree-Fock energy of the UCDW are…
Compressible Anisotropic States around the Half-Filled Landau Levels
Nobuki Maeda
Using the von Neumann lattice formalism, we study compressible anisotropic states around the half-filled Landau levels in the quantum Hall system. In these states the unidirectiona…
Stability of the compressible quantum Hall state around the half-filled Landau level
Kenzo Ishikawa, Nobuki Maeda, Tetsuyuki Ochiai
We study the compressible states in the quantum Hall system using a mean field theory on the von Neumann lattice. In the lowest Landau level, a kinetic energy is generated dynamica…
Quantum Hall Dynamics on von Neumann Lattice
K. Ishikawa, N. Maeda, T. Ochiai +1
Quantum Hall Dynamics is formulated on von Neumann lattice representation where electrons in Landau levels are defined on lattice sites and are treated systematically like lattice…
Field Theory on the von Neumann Lattice and the Quantized Hall Conductance of Bloch Electrons
K. Ishikawa, N. Maeda, T. Ochiai +1
We construct useful sets of one-particle states in the quantum Hall system based on the von Neumann lattice. Using the set of momentum states, we develop a field-theoretical formal…
Theory of Current-Induced Breakdown of the Quantum Hall Effect
Kenzo Ishikawa, Nobuki Maeda, Tetsuyuki Ochiai +1
By studying the quantum Hall effect of stationary states with high values of injected current using a von Neumann lattice representation, we found that broadening of extended state…