65 citations · 187 across the 11 of their papers we have counts for
9 papers · 1 filter
Spin-resoloved chiral condensate as a spin-unpolarized ν=0 quantum Hall state in graphene
Yuji Hamamoto, Tohru Kawarabayashi, Hideo Aoki +1
Motivated by the recent experiments indicating a spin-unpolarized ν=0 quantum Hall state in graphene, we theoretically investigate the ground state based on the many-body problem p…
Chiral Symmetry and Many-Body Effect in Multilayer Graphene
Yuji Hamamoto, Tohru Kawarabayashi, Hideo Aoki +1
Influence of the chiral symmetry on the many-body problem in multilayer graphene in magnetic fields is investigated. For a spinless electron model on the honeycomb lattice the many…
Chiral symmetry and its manifestation in optical responses in graphene: interaction and multi-layers
Y. Hatsugai, T. Morimoto, T. Kawarabayashi +2
Chiral symmetry, fundamental in the physics of graphene, guarantees the existence of topologically stable doubled Dirac cones and anomalous behaviors of the zero-energy Landau leve…
Chiral condensate with topological degeneracy in graphene and its manifestation in edge states
Yuji Hamamoto, Hideo Aoki, Yasuhiro Hatsugai
Role of chiral symmetry in many-body states of graphene in strong magnetic fields is theoretically studied with the honeycomb lattice model. For a spin-split Landau level where the…
Chiral Symmetry and Electron-Electron Interaction in Many-Body Gap Formation in Graphene
Y. Hamamoto, Y. Hatsugai, H. Aoki
We study a many-body ground state of graphene in perpendicular magnetic fields. Chiral symmetry in graphene enables us to determine the many-body ground state, which turns out to b…
Quantum phase transition of dynamical resistance in a mesoscopic capacitor
Yuji Hamamoto, Thibaut Jonckheere, Takeo Kato +1
We study theoretically dynamic response of a mesoscopic capacitor, which consists of a quantum dot connected to an electron reservoir via a point contact and capacitively coupled t…
Dynamic response of a mesoscopic capacitor in the presence of strong electron interactions
Yuji Hamamoto, Thibaut Jonckheere, Takeo Kato +1
We consider a one dimensional mesoscopic capacitor in the presence of strong electron interactions and compute its admittance in order to probe the universal nature of the relaxati…
Numerical study of the Coulomb blockade in an open quantum dot
Yuji Hamamoto, Takeo Kato
The Coulomb blockade in an open quantum dot connected to a bulk lead by a single mode point contact is studied numerically using the path-integral Monte Carlo method. The Coulomb o…
Numerical study of transport through a single impurity in a spinful Tomonaga-Luttinger liquid
Yuji Hamamoto, Ken-Ichiro Imura, Takeo Kato
The single impurity problem in a spinful Tomonaga-Luttinger liquid is studied numerically using path-integral Monte Carlo methods. The advantage of our approach is that the system…