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First-Principles Electronic Structure of Solid Picene
Taichi Kosugi, Takashi Miyake, Shoji Ishibashi +2
To explore the electronic structure of the first aromatic superconductor, potassium-doped solid picene which has been recently discovered by Mitsuhashi et al with the transition te…
Optical Hall conductivity in 2DEG and graphene QHE systems
Takahiro Morimoto, Yasuhiro Hatsugai, Hideo Aoki
We have revealed from a numerical study that the Hall plateaus are retained in the optical Hall conductivity in the ac ( THz) regime in both of the ordinary two-d…
Landau level broadening in graphene with long-range disorder -- Robustness of the n=0 level
Tohru Kawarabayashi, Yasuhiro Hatsugai, Hideo Aoki
Broadening of the Landau levels in graphene and the associated quantum Hall plateau-to-plateau transition are investigated numerically. For correlated bond disorder, the graphene-s…
Spin-density functional study of the organic polymer dimethylaminopyrrole: A realization of the organic periodic Anderson model
Yuji Suwa, Ryotaro Arita, Kazuhiko Kuroki +1
While the periodic Anderson model (PAM) has been recognized as a good model for various heavy f-electron systems, here we design a purely organic polymer whose low-energy physics c…
Tight-binding photonic bands in metallophotonic waveguide networks and flat bands in kagome lattices
Shimpei Endo, Takashi Oka, Hideo Aoki
We propose that we can realize "tight-binding photonic bands" in metallophotonic waveguide networks, where the photonic bound states localized around the crossings of a network for…
Photovoltaic Berry curvature in the honeycomb lattice
Takashi Oka, Hideo Aoki
Photovoltaic Hall effect -- the Hall effect induced by intense, circularly-polarized light in the absence of static magnetic fields -- has been proposed in Phys. Rev. B 79, 081406R…
Nonequilibrium magnetic and superconducting phases in the two-dimensional Hubbard model coupled to electrodes
Takashi Oka, Hideo Aoki
A theory is presented for a nonequilibrium phase transition in the two-dimensional Hubbard model coupled to electrodes. Nonequilibrium magnetic and superconducting phase diagram is…
Pnictogen height as a possible switch between high-T_c nodeless and low-T_c nodal pairings in the iron based superconductors
Kazuhiko Kuroki, Hidetomo Usui, Seiichiro Onari +2
We study the effect of the lattice structure on the spin-fluctuation mediated superconductivity in the iron pnictides adopting the five-band models of several virtual lattice struc…
Optical Hall conductivity in ordinary and graphene QHE systems
Takahiro Morimoto, Yasuhiro Hatsugai, Hideo Aoki
We have revealed from a numerical study that the optical Hall conductivity has a characteristic feature even in the ac ( THz) regime in that the Hall plateaus are…
Quantum Hall plateau transition in graphene with spatially correlated random hopping
Tohru Kawarabayashi, Yasuhiro Hatsugai, Hideo Aoki
We investigate how the criticality of the quantum Hall plateau transition in disordered graphene differs from those in the ordinary quantum Hall systems, based on the honeycomb lat…
Photo-induced Hall Effect in Graphene -- Effect of Boundary Types
Takashi Oka, Hideo Aoki
We theoretically predict, with the Keldysh Green's function combined with the Floquet method, that the AC electric field of a circularly polarized light should induce a Hall effect…
Dielectric Breakdown in a Mott Insulator: Many-body Schwinger-Landau-Zener Mechanism studied with a Generalized Bethe Ansatz
Takashi Oka, Hideo Aoki
The nonadiabatic quantum tunneling picture, which may be called the many-body Schwinger-Landau-Zener mechanism, for the dielectric breakdown of Mott insulators in strong electric f…
Nonequilibrium Steady State of Photoexcited Correlated Electrons in the Presence of Dissipation
Naoto Tsuji, Takashi Oka, Hideo Aoki
We present a framework to determine nonequilibrium steady states in strongly correlated electron systems in the presence of dissipation. This is demonstrated for a correlated elect…
Unconventional pairing originating from disconnected Fermi surfaces in the iron-based superconductor
Kazuhiko Kuroki, Hideo Aoki
For the iron-based high superconductor LaFeAsOF, we construct a minimal model, where all of the five Fe bands turn out to be involved. We then investigate the…