48 citations · 188 across the 15 of their papers we have counts for
15 papers
Coexistence of - and -wave gaps due to pair-hopping and exchange interactions
Shigeru Koikegami
I investigate the superconductivity of the three-band -- model derived from the three-band Hubbard model using the Schrieffer-Wolff transformation. My model is designed co…
Inhomogeneous Electronic Distribution in High-Tc Cuprates
Shigeru Koikegami, Masaru Kato, Takashi Yanagisawa
We theoretically investigate the doping evolution of the electronic state of high-Tc cuprate on both sides of the half-filling on the basis of the three-dimensional three-band Hubb…
Unrestricted Hartree-Fock Analysis of SrCaRuO
Shigeru Koikegami, Takashi Yanagisawa, Soh Koike
We investigated the electronic and magnetic structure of SrCaRuO () on the basis of the double-layered three-dimensional multiband Hubbard mode…
Three-Dimensional Multiband d-p Model of Superconductivity in Spin-Chain Ladder Cuprate
Shigeru Koikegami, Takashi Yanagisawa
We study the superconductivity in the three-dimensional multiband d-p model, in which a CuO-ladder layer and a CuO-chain layer are alternately stacked, as a model of th…
Kink structure in the electronic dispersion of high-Tc superconductors from the electron-phonon interaction
Shigeru Koikegami, Yoshihiro Aiura
We investigate the electronic dispersion of high-Tc superconductor on the basis of the two-dimensional three-band Hubbard model with the electron-phonon interaction together with t…
Metallic State of the Three-band Hubbard Model with Super-lattice Structure
Shigeru Koikegami, Takashi Yanagisawa, Masaru Kato
We investigate the dynamical superlattice correlation in the two-dimensional three-band Hubbard model on the basis of the unrestricted fluctuation exchange approximation. We calcul…