Sumio Ishihara

Distorted perovskite witheg1configuration as a frustrated spin system

The evolution of spin- and orbital-ordered states has been investigated for a series of insulating perovskites

TRANSITION BETWEEN TWO FERROMAGNETIC STATES DRIVEN BY ORBITAL ORDERING IN LA0.88SR0.12MNO3

R{\mathrm{MnO}}_{3}

THEORY OF ANOMALOUS X-RAY SCATTERING IN ORBITAL-ORDERED MANGANITES

(R=\mathrm{L}\mathrm{a},\mathrm{P}\mathrm{r},\mathrm{N}\mathrm{d},\dots{}).

Electronic Ferroelectricity and Frustration

R{\mathrm{MnO}}_{3}

Electronic Ferroelectricity in a Dimer Mott Insulator

with a large

Interplay of electron-phonon interaction and electron correlation in high-temperature superconductivity

{\mathrm{GdFeO}}_{3}

Orbital degree of freedom and phase separation in ferromagnetic manganites at finite temperatures

-type distortion is regarded as a frustrated spin system having ferromagnetic nearest-neighbor and antiferromagnetic (AF) next-nearest-neighbor (NNN) interactions within a

Resonant x-ray scattering in manganites: study of the orbital degree of freedom

{\mathrm{MnO}}_{2}