Hiori Kino

Phase Diagram of Superconductivity on the Anisotropic Triangular Lattice Hubbard Model: An Effective Model of κ-(BEDT-TTF) Salts

We study the electronic states of the anisotropic triangular lattice Hubbard model at half-filling, which is a simple effective model for the organic superconducting κ-BEDT-TTF compounds. We treat the effect of the Coulomb interaction by the fluctuation exchange (FLEX) method, and obtain the phase diagram of this model for various sets of parameters. It is shown that d-wave superconductivity is realized in a wide region of the phase diagram, next to the antiferromagnetic states. The obtained phase diagram explains well the characteristics of the experimental results.

Effects of Spin Fluctuations in Quasi-One-Dimensional Organic Superconductors

We study the electronic states of quasi-one-dimensional organic conductors using the single band Hubbard model at half-filling. We treat the effects of the on-site Coulomb interaction by the fluctu...

Effects of Spin Fluctuations and Superconductivity in Quasi-One-Dimensional Organic Conductors

We study the electronic states using the single band Hubbard model at half-filling. We treat the effects of the on-site Coulomb interaction by the fluctuation-exchange (FLEX) method, and calculate the phase diagram and physical properties. The calculated pressure dependence of the magnetic transition temperature coincides well with the experimental one. We also show that a pseudogap is formed in the density of states near the chemical potential and that the NMR relaxation rate increases on cooling in the low-temperature region, and that d-wave superconductivity appears next to the antiferromagnetic state.

GW quasiparticle band structure of CaB6

Much controversy is aroused in the electronic structure of hexaborides both in theories and experiments. In order to settle this problem, the quasiparticle energies are calculated including the effects of electron correlations beyond the local density approximation in the stoichiometric calcium hexaborides. It is shown that electron correlation does not open the band gap, contrary to the naive expectation. This semimetallic band structure coincides with the magnetic oscillation measurements, and the origin of this abnormal quasiparticle shifts is elucidated as being closely connected with the details of the wavefunctions in the non-local interaction terms.

Theory of the Hall coefficient and resistivity for the layered organic superconductors κ − ( BEDT − TTF ) 2 X

In the organic superconducting

Interplay between structure and electronic properties in organic conductors

ensuremath{kappa}ensuremath{-}(mathrm{BEDT}ensuremath{-}mathrm{TTF}{)}_{2}X

On the origin of the phase transition of α-(BEDT-TTF)2I3

compounds, various transport phenomena exhibit striking non-Fermi liquid behaviors, which should be the important clues to understanding the electronic state of this system. Especially, the Hall coefficient

Possible appearance of superconductivity on Si(100) surface

{(R}_{mathrm{H}})

The GW approximation: Theory and application to YH3

shows Curie-Weiss-type temperature dependence, which is similar to that of high-

Abnormal quasiparticle shifts inCaB6

{T}_{mathrm{c}}