Photoinduced nonequilibrium phenomena in magnets with strong electron correlation are
reviewed. Owing to the strong competition between electron itineracy and localization and …

Spin state transitions and intermetallic charge transfers can essentially change material
structural and physical properties while excluding external chemical do**. However, these …

The fundamental idea of the excitonic insulator (EI) driven by electron–hole correlations in
narrow-gap semiconductors or semimetals was originally proposed in the 1960s, and only …

An excitonic-insulating system is studied from a viewpoint of the orbital physics in strongly
correlated electron systems. An effective model Hamiltonian for low-energy electronic states …

We use a combination of dynamical mean-field model calculations and LDA+ U material
specific calculations to investigate the low temperature phase transition in the compounds …

Neutron diffraction studies have been carried out in the temperature (T) range between 10
and 130 K on a single crystal of YBaCo 4 O 7, which has the stacking of kagome and …

Magnetic susceptibility and heat capacity due to the spin-state transition in La Co O 3 were
calculated by a molecular-field model in which the energy-level diagram of high-spin state …

The magnetic, electric, and thermal properties of the (L n 1− y Y y) 0.7 Ca 0.3 CoO 3
perovskites (L n= Pr, Nd) were investigated down to very low temperatures. The main …

X-ray absorption spectroscopy measurements in Pr 0.5 Ca 0.5 CoO 3 were performed at the
Pr M 4, 5, Pr L 3, and Ca L 2, 3 absorption edges as a function of temperature below 300 K …

X-ray absorption spectroscopy measurements in Pr 0. 5 Ca 0. 5 CoO 3 and (Pr, Y) 0. 55 Ca
0. 45 CoO 3 compositions reveal that the valence of praseodymium ions is stable and …