686 citations · 1.9k across the 35 of their papers we have counts for
35 papers
Fourth-Order Perturbation Expansion for Hubbard Model on a Two-Dimensional Square Lattice
H. Ikeda, S. Shinkai, K. Yamada
We investigate the Hubbard model on a two-dimensional square lattice by the perturbation expansion to the fourth order in the on-site Coulomb repulsion U. Numerically calculating a…
Giant Orbital Hall Effect in Transition Metals: Origin of Large Spin and Anomalous Hall Effects
H. Kontani, T. Tanaka, D. S. Hirashima +2
In transition metals and their compounds, the orbital degrees of freedom gives rise to an orbital current, in addition to the ordinary spin and charge currents. We reveal that cons…
Study of Intrinsic Spin Hall Effect and Orbital Hall Effect in 4d- and 5d- Transition Metals
T. Tanaka, H. Kontani, M. Naito +4
We study the intrinsic spin Hall conductivity (SHC) in various -transition metals (Ta, W, Re, Os, Ir, Pt, and Au) and 4d-transition metals (Nb, Mo, Tc, Ru, Rh, Pd, and Ag) base…
Intrinsic anomalous Hall effect in ferromagnetic metals studied by the multi d-orbital tight-binding model
H. Kontani, T. Tanaka, K. Yamada
To elucidate the origin of anomalous Hall effect (AHE) in ferromagnetic transition metals, we study the intrinsic AHE based on a multi-orbital (xz,yz)-tight-binding model. We find…
Theoretical Study on Coexistence of Ferromagnetism and Superconductivity
Hirono Kaneyasu, Kosaku Yamada
On the basis of a two-dimensional t-t' Hubbard model in ferromagnetic and paramagnetic states, the triplet superconducting mechanism is investigated by the third-order perturbation…
Theory on Superconductivity of CeIn3 in Heavy Fermion System
Hirono Fukazawa, Kosaku Yamada
On the basis of a three-dimensional Hubbard model, the superconducting mechanism of CeIn3 under high pressure is investigated by the third-order perturbation theory with respect to…