22 citations · 35 across the 3 of their papers we have counts for
7 papers
Unified description of cuprate superconductors using four-band - model
Hiroshi Watanabe, Tomonori Shirakawa, Kazuhiro Seki +4
In the 35 years since the discovery of cuprate superconductors, we have not yet reached a unified understanding of their properties, including their material dependence of the supe…
Bond-length distributions classified by coordination environments
Motonari Sawada, Ryoga Iwamoto, Takao Kotani +1
We have analyzed bond-length distributions between cations and anions for crystal structures in the crystallographic open database (www.crystallography.net/cod/). The distributions…
Model construction and a possibility of cuprate-like pairing in a new d9 nickelate superconductor (Nd,Sr)NiO2
Hirofumi Sakakibara, Hidetomo Usui, Katsuhiro Suzuki +3
Effective models are constructed for a newly discovered superconductor (Nd,Sr)NiO2, which has been considered as a possible nickelate analogue of the cuprates owing to the d9 elect…
A finite electric-field approach to evaluate the vertex correction for the screened Coulomb interaction in the quasiparticle self-consistent GW method
Hirofumi Sakakibara, Takao Kotani, Masao Obata +1
We apply the quasiparticle self-consistent GW method (QSGW) to slab models of ionic materials, LiF, KF, NaCl, MgO, and CaO, under electric field. Then we obtain the optical dielect…
Model-mapped random phase approximation to evaluate superconductivity in the fluctuation exchange approximation from first principles
Hirofumi Sakakibara, Takao Kotani
We have applied the model-mapped RPA [H. Sakakibara et al., J. Phys. Soc. Jpn. 86, 044714 (2017)] to the cuprate superconductors La2CuO4 and HgBa2CuO4, resulting two-orbital Hubbar…
Material Optimization for Fermi Surface Shape Control of Tl-based Cuprate Superconductors
Satoaki Miyao, Hirofumi Sakakibara, Isao Maruyama +2
To show an optimization method of element substitution for cuprate superconductors, we investigate Fermi surface shape of TlR2A2Cu3O9 with R=La, Y, and A=Li, Na, K, Rb, Cs. We adop…