207 citations · 2.1k across the 81 of their papers we have counts for
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Polarization-analyzed resonant inelastic x-ray scattering of the orbital excitations in KCuF3
K. Ishii, S. Ishihara, Y. Murakami +13
We report a Cu K-edge resonant inelastic x-ray scattering (RIXS) study of orbital excitations in KCuF3 . By performing the polarization analysis of the scattered photons, we disclo…
Quantum Dielectric Fluctuation in an Electronic Ferroelectricity studied by Variational Monte-Carlo Method
Tsutomu Watanabe, Sumio Ishihara
Electronic structure and dielectric property in an electronic ferroelectricty, where electric polarization is driven by an electronic charge order without inversion symmetry, are s…
Electronic Ferroelectricity in a Dimer Mott Insulator
Makoto Naka, Sumio Ishihara
Motivated from recent experiments in kappa-(BEDT-TTF)_2Cu_2(CN)_3, dielectric and magnetic properties in a dimer-Mott insulator are studied. We derive the effective Hamiltonian whe…
Ring-exchange interaction in doubly degenerate orbital system
Joji Nasu, Sumio Ishihara
Ring-exchange (RE) interaction in Mott insulator with doubly degenerate orbitals is studied. Hamiltonian for the RE interaction is derived by the perturbational calculation.…