290 citations · 1.6k across the 46 of their papers we have counts for
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An efficient method for calculating spatially extended electronic states of large systems with a divide-and-conquer approach
Shunsuke Yamada, Fuyuki Shimojo, Ryosuke Akashi +1
We present an efficient post-processing method for calculating the electronic structure of nanosystems based on the divide-and-conquer approach to density functional theory (DC-DFT…
Anisotropic superconducting gaps in YNiBC: A first-principles investigation
Mitsuaki Kawamura, Ryosuke Akashi, Shinji Tsuneyuki
We calculate superconducting gaps and quasiparticle density of states of YNiBC in the framework of the density functional theory for superconductors to investigate the orig…
Numerical Investigation of Triexciton Stabilization in Diamond with Multiple Valleys and Bands
Hiroki Katow, Junko Usukura, Ryosuke Akashi +2
The existence of polyexcitons, the -body complexes of excitons for in 3D bulk systems, has been controversial for more than 40 years since its first theoretical suggesti…
Interference of the Bloch phase in layered materials with stacking shifts
Ryosuke Akashi, Yo Iida, Kohei Yamamoto +1
In periodic systems, electronic wave functions of the eigenstates exhibit the periodically modulated Bloch phases and are characterized by their wave numbers . We theoreti…
Effect of van Hove singularities on high-Tc superconductivity in H3S
Wataru Sano, Takashi Koretsune, Terumasa Tadano +2
One of interesting open questions for the high transition temperature (Tc) superconductivity in sulfur hydrides is why high pressure phases of H3S have extremely high Tc's. Recentl…