19 citations · 67 across the 8 of their papers we have counts for
8 papers
Effect of Coulomb Interaction on Seebeck Coefficient of Organic Dirac Electron System -(BEDT-TTF)I
Daigo Ohki, Yukiko Omori, Akito Kobayashi
Motivated by the results of recent thermoelectric effect studies, we show the effects of Coulomb interactions on the Seebeck coefficient based on an extended Hubbard model that des…
Domain Wall Conductivity with strong Coulomb interaction of two-dimensional massive Dirac Electrons in the Organic Conductor -(BEDT-TTF)I
Daigo Ohki, Yukiko Omori, Akito Kobayashi
Motivated by the results of recent transport and optical conductivity studies, we propose a semi-infinite two-dimensional lattice model for interacting massive Dirac electrons in t…
Electrical permittivity driven metal-insulator transition in heterostructures of nonpolar Mott- and band insulators
Yukiko Omori, Andreas Rüegg, Manfred Sigrist
Metallic interfaces between insulating perovskites are often observed in heterostructures combining polar and nonpolar materials. In these systems, the polar discontinuity across t…
Edge States in Molecular Solid α-(BEDT-TTF)2I3: Effects of Electron Correlations
Yukiko Omori, Genki Matsuno, Akito Kobayashi
We examine the edge states of the Dirac electrons in the molecular material α-(BEDT-TTF)2I3 with electron-electron interactions. Based on the analysis of the extended Hubbard model…
Ab initio derivation of multi-orbital extended Hubbard model for molecular crystals
Masahisa Tsuchiizu, Yukiko Omori, Yoshikazu Suzumura +2
From configuration interaction (CI) ab initio calculations, we derive an effective two-orbital extended Hubbard model based on the gerade (g) and ungerade (u) molecular orbitals (M…
Multi-Orbital Molecular Compound (TTM-TTP)I_3: Effective Model and Fragment Decomposition
Masahisa Tsuchiizu, Yukiko Omori, Yoshikazu Suzumura +4
The electronic structure of the molecular compound (TTM-TTP)I_3, which exhibits a peculiar intra-molecular charge ordering, has been studied using multi-configuration ab initio cal…
Intramolecular charge ordering in the multi molecular orbital system (TTM-TTP)I_3
Marie-Laure Bonnet, Vincent Robert, Masahisa Tsuchiizu +2
Starting from the structure of the (TTM-TTP)I_3 molecular-based material, we examine the characteristics of frontier molecular orbitals using ab initio (CASSCF/CASPT2) configuratio…
Possible Metastable State Triggered by Competition of Peierls State and Charge Ordered State
Y. Omori, M. Tsuchiizu, Y. Suzumura
We examine a Peierls ground state and its competing metastable state in the one-dimensional quarter-filled Peierls-Hubbard model with the nearest-neighbor repulsive interaction V a…