23 citations · 23 across the 2 of their papers we have counts for
8 papers · 1 filter
Dilution effect in correlated electron system with orbital degeneracy
Takayoshi Tanaka, Sumio Ishihara
Theory of dilution effect in orbital ordered system is presented. The orbital model without spin degree of freedom and the spin-orbital coupled model in a three-dimensional s…
Theory of Layered Iron Oxide on Frustrated Geometry: Electric Polarization, Magnetoelectric Effect and Orbital State
A. Nagano, M. Naka, J. Nasu +1
A layered iron oxide \rfeo (: rare-earth elements) is an exotic dielectric material with charge-order (CO) driven electric polarization and magnetoelectric effect caused by spin…
Resonant inelastic x-ray scattering study of hole-doped manganites La1-xSrxMnO3 (x=0.2 and 0.4)
K. Ishii, T. Inami, K. Ohwada +8
Electronic excitations near the Fermi energy in the hole doped manganese oxides (La1-xSrxMnO3, x=0.2 and 0.4) have been elucidated by using the resonant inelastic x-ray scattering…
Orbital excitations in CMR progenitor of LaMnO3 studied by resonant inelastic x-ray scattering
T. Inami, S. Ishihara, H. Kondo +8
We report resonant inelastic x-ray scattering experiments of the orbital ordered manganite LaMnO3. When the incident photon energy is tuned near the Mn K absorption edge, the spect…
Temperature dependence of the resistivity in the double-exchange model
Satoshi Ishizaka, Sumio Ishihara
The resistivity around the ferromagnetic transition temperature in the double exchange model is studied by the Schwinger boson approach. The spatial spin correlation responsible fo…
Two Ferromagnetic States in Magnetoresistive Manganites - First Order Transition Driven by Orbitals -
S. Maekawa, S. Ishihara, S. Okamoto
A systematic study of the electronic structure in perovskite manganites is presented. The effective Hamiltonian is derived by taking into account the degeneracy of orbitals a…