45 citations · 118 across the 6 of their papers we have counts for
6 papers
Collective mode excitations and simulated -edge resonant-inelastic x-ray scattering spectra in antiferromagnetic CaRuO
Shunsuke Yamamoto, Yukinori Ohta, Koudai Sugimoto
Using the three-orbital Hubbard model, we investigate the low-energy excitation spectra in the antiferromagnetic phase of CaRuO. We calculate the dynamical susceptibilities…
Emergence of pure spin current in doped excitonic magnets
Shunsuke Yamamoto, Koudai Sugimoto, Yukinori Ohta
An excitonic magnet hosts a condensate of spin-triplet excitons composed of conduction-band electrons and valence-band holes, and may be described by the two-orbital Hubbard model.…
An order-N electronic structure theory with generalized eigenvalue equations and its application to a ten-million-atom system
T. Hoshi, S. Yamamoto, T. Fujiwara +2
A linear-algebraic theory called 'multiple Arnoldi method' is presented and realizes large-scale (order-N) electronic structure calculation with generalized eigen-value equations.…
GW approximation with LSDA+U method and applications to NiO, MnO, and VO
S. Kobayashi, Y. Nohara, S. Yamamoto +1
A GW approximation (GWA) method named U+GWA is proposed, where we can start GWA with more localized wave functions obtained by the local spin-density approximation (LSDA)+U method.…
Theory of large-scale matrix computation and applications to electronic structure calculation
Takeo Fujiwara, Takeo Hoshi, Susumu Yamamoto
We review our recently developed methods for large-scale electronic structure calculations, both in one-electron theory and many-electron theory. The method are based on the densit…
Charge and spin stripe in LaSrNiO (x=1/3,1/2)
S. Yamamoto, T. Fujiwara, Y. Hatsugai
Electronic structure of stripe ordered LaSrNiO is investigated. The system with x=1/3 is insulator, in LSDA+U calculations, and shows charge and spin stripe, co…