175 citations · 261 across the 6 of their papers we have counts for
21 papers
Chemical physics of superconductivity in layered yttrium carbide halides from first principles
Ryosuke Akashi, Ryotaro Arita, Chao Zhang +2
We perform a thorough first-principles study on superconductivity in yttrium carbide halide YC (=Cl, Br, I) whose maximum transition temperature () amoun…
Superconductivity at 253 K in lanthanum-yttrium ternary hydrides
Dmitrii V. Semenok, Ivan A. Troyan, Alexander G. Kvashnin +14
Polyhydrides offer intriguing perspectives as high-temperature superconductors. Here we report the high-pressure synthesis of a series of lanthanum-yttrium ternary hydrides: cubic…
Coexistence of spontaneous polarization and superconductivity in hole-doped oxyhydrides ATiO_2H (A=K, Rb, Cs): first-principles study
Minjae Ghim, Nobuya Sato, Ryosuke Akashi +2
The polar metal is a material that hosts both polar distortion and metallicity. Such a material is expected to show exotic magneto-electric phenomena if superconducts. Here, we the…
First Principles Study of the Optical Dipole Trap for Two-Dimensional Excitons in Graphane
Hiroki Katow, Ryosuke Akashi, Yoshiyuki Miyamoto +1
Recent studies on excitons in two-dimensional materials have been widely conducted for their potential usages for novel electronic and optical devices. Especially, sophisticated ma…
Effect of spin fluctuations on superconductivity in V and Nb: a first-principles study
Kentaro Tsutsumi, Yuma Hizume, Mitsuaki Kawamura +2
We study the superconductivity in typical -band elemental superconductors V and Nb with the recently developed non-empirical computational scheme based on the density functional…
Defining a well-ordered Floquet basis by the average energy
Cristian M. Le, Ryosuke Akashi, Shinji Tsuneyuki
At the moment, the most efficient method to compute the state of a periodically driven quantum system is using Floquet theory and the Floquet eigenbasis. The wide application of th…