Naoki Yoneyama

Anomalous dielectric response in the dimer Mott insulatorκ−(BEDT-TTF)2Cu2(CN)3

We have measured and analyzed the dielectric constant of the dimer Mott insulator

Magnetic and electronic phase diagram and superconductivity in the organic superconductors kappa κ-(ET)2X

\kappa-

Imaging Phase Separation near the Mott Boundary of the Correlated Organic Superconductors κ-(BEDT-TTF)2X

(BEDT-TTF)

Optical Probe of Carrier Doping by X-Ray Irradiation in the Organic Dimer Mott Insulator κ-(BEDT-TTF)2Cu[N(CN)2]Cl

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Electron Localization near the Mott Transition in the Organic Superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br

Cu

Real Space Imaging of the Metal–Insulator Phase Separation in the Band Width Controlled Organic Mott System κ-(BEDT-TTF)2Cu[N(CN)2]Br

_2

X-ray Irradiation-Induced Carrier Doping Effects in Organic Dimer-Mott Insulators

(CN)

Superconducting properties under magnetic field in Na0.35CoO2.1.3H2O single crystal

_3

Microscopic Phase Separation in Triangular-Lattice Quantum Spin Magnet κ-(BEDT-TTF)2Cu2(CN)3 Probed by Muon Spin Relaxation

, which is known as a playground for a spin-liquid state. Most unexpectedly, this particular organic salt has nontrivial charge degrees of freedom, being characterized by a dipole-glass-like dielectric relaxation below around 60 K. This is ascribed to the charge disproportionation within the dimer due to the intersite Coulomb repulsion. In this respect, the dipole observed here is purely quantum mechanical, and thereby exhibits unexpected responses.

Substitution Effect by Deuterated Donors on Superconductivity in κ-(BEDT-TTF)2Cu[N(CN)2]Br

The magnetic susceptibility of the organic superconductors