468 citations · 875 across the 17 of their papers we have counts for
29 papers
Monte Carlo study of cuprate superconductors in a four-band - model: Role of orbital degrees of freedom
Hiroshi Watanabe, Tomonori Shirakawa, Kazuhiro Seki +4
Understanding the complex phase diagram of cuprate superconductors is a long-standing challenging problem. Recent studies have shown that orbital degrees of freedom, both Cu …
First-principles method justifying the Dieke diagram and beyond
Katsuhiro Suzuki, Takao Kotani, Kazunori Sato
We present a method to determine the model Hamiltonians to treat rare-earth multiplets in solids from the results of the quasiparticle self-consistent \textit{GW} (QSGW) method. We…
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…
Non-linear extension of the dynamical linear response of spins; extended Heisenberg model
Haruki Okumura, Kazunori Sato, Takao Kotani
We introduce a new extended Heisenberg model. The model contains the orbital-dependent spins together with the retarded effects of spin torque. The model is directly derived from t…
Contracted Plane Wave satisfying periodic gauge
Takao Kotani
We introduce the contracted plane waves (CPWs), which satisfy the periodic gauge in the Brillouin-zone torus as in the case of usual Wannier functions. CPWs are very simply given a…