Search Results - "Akashi, Ryosuke"

Completing density functional theory by machine learning hidden messages from molecules by Nagai, Ryo, Akashi, Ryosuke, Sugino, Osamu

“…Kohn–Sham density functional theory (DFT) is the basis of modern computational approaches to electronic structures. Their accuracy heavily relies on the…”
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Development of density-functional theory for a plasmon-assisted superconducting state: application to lithium under high pressures by Akashi, Ryosuke, Arita, Ryotaro

“…We extend the density-functional theory for superconductors (SCDFT) to take account of the dynamical structure of the screened Coulomb interaction. We…”
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Anomalous High‐Temperature Superconductivity in YH6 by Troyan, Ivan A., Semenok, Dmitrii V., Kvashnin, Alexander G., Sadakov, Andrey V., Sobolevskiy, Oleg A., Pudalov, Vladimir M., Ivanova, Anna G., Prakapenka, Vitali B., Greenberg, Eran, Gavriliuk, Alexander G., Lyubutin, Igor S., Struzhkin, Viktor V., Bergara, Aitor, Errea, Ion, Bianco, Raffaello, Calandra, Matteo, Mauri, Francesco, Monacelli, Lorenzo, Akashi, Ryosuke, Oganov, Artem R.

“…Pressure‐stabilized hydrides are a new rapidly growing class of high‐temperature superconductors, which is believed to be described within the conventional…”
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Machine-learning-based exchange correlation functional with physical asymptotic constraints by Nagai, Ryo, Akashi, Ryosuke, Sugino, Osamu

“…Density functional theory is the standard theory for computing the electronic structure of materials, which is based on a functional that maps the electron…”
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Superconductivity at 253 K in lanthanum–yttrium ternary hydrides by Semenok, Dmitrii V., Troyan, Ivan A., Ivanova, Anna G., Kvashnin, Alexander G., Kruglov, Ivan A., Hanfland, Michael, Sadakov, Andrey V., Sobolevskiy, Oleg A., Pervakov, Kirill S., Lyubutin, Igor S., Glazyrin, Konstantin V., Giordano, Nico, Karimov, Denis N., Vasiliev, Alexander L., Akashi, Ryosuke, Pudalov, Vladimir M., Oganov, Artem R.

“…[Display omitted] Here we report the high-pressure synthesis of a series of lanthanum–yttrium ternary hydrides obtained at pressures of 170–196GPa via the…”
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Density Functional Theory for Plasmon-Assisted Superconductivity by Akashi, Ryosuke, Arita, Ryotaro

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Search for common minima in joint optimization of multiple cost functions by Adachi, Daiki, Tsujimoto, Naoto, Akashi, Ryosuke, Todo, Synge, Tsuneyuki, Shinji

“…We present a novel optimization method, named the Combined Optimization Method (COM), for the joint optimization of two or more cost functions. Unlike the…”
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Nonempirical Calculation of Superconducting Transition Temperatures in Light‐Element Superconductors by Arita, Ryotaro, Koretsune, Takashi, Sakai, Shiro, Akashi, Ryosuke, Nomura, Yusuke, Sano, Wataru

“…Recent progress in the fully nonempirical calculation of the superconducting transition temperature (Tc) is reviewed. Especially, this study focuses on three…”
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Stochastic Formalism for Thermally Driven Distribution Frontier: A Nonempirical Approach to the Potential Escape Problem by Akashi, Ryosuke, Nagornov, Yuri S.

“…We develop a non-empirical scheme to search for the minimum-energy escape paths from the minima of the potential surface to unknown saddle points nearby. A…”
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Coulomb Energy Density Functionals for Nuclear Systems: Recent Studies of Coulomb Exchange and Correlation Functionals by Naito, Tomoya, Akashi, Ryosuke, Colò, Gianluca, Liang, Haozhao, Roca-Maza, Xavier

“…The Coulomb exchange and correlation energy density functionals for electron systems are applied to nuclearsystems. It is found that the exchange functionals…”
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Nonempirical study of superconductivity in alkali-doped fullerides based on density functional theory for superconductors by Akashi, Ryosuke, Arita, Ryotaro

“…We apply the density functional theory for superconductors based on the local density approximation (LDA) to alkali-doped fullerides A sub(3) C sub(60) with a…”
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Illuminating the Bragg intersections as roots of Dirac nodal lines and high-order van Hove singularities by Akashi, Ryosuke

“…We theoretically reexamine nearly uniform electron models with weak crystalline potentials. In particular, we theorize the modulation of the plane-wave…”
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First-principles study of the pressure and crystal-structure dependences of the superconducting transition temperature in compressed sulfur hydrides by Akashi, Ryosuke, Kawamura, Mitsuaki, Tsuneyuki, Shinji, Nomura, Yusuke, Arita, Ryotaro

“…We calculate the superconducting transition temperatures (T sub(c)) in sulfur hydrides H sub(2)S and H sub(3)S from first principles using the density…”
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AtomREM: Non-empirical seeker of the minimum energy escape paths on many-dimensional potential landscapes without coarse graining by Nagornov, Yuri S., Akashi, Ryosuke

“…Recently a non-empirical stochastic walker algorithm has been developed to search for the minimum-energy escape paths from the minima of the potential surface…”
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Possible "Magnéli" Phases and Self-Alloying in the Superconducting Sulfur Hydride by Akashi, Ryosuke, Sano, Wataru, Arita, Ryotaro, Tsuneyuki, Shinji

“…We theoretically give an infinite number of metastable crystal structures for the superconducting sulfur hydride H_{x}S under pressure. Previously predicted…”
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First-Principles Study of the Optical Dipole Trap for Two-Dimensional Excitons in Graphane by Katow, Hiroki, Akashi, Ryosuke, Miyamoto, Yoshiyuki, Tsuneyuki, Shinji

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Non-empirical weighted Langevin mechanics for the potential escape problem: Parallel algorithm and application to the Argon clusters by Nagornov, Yuri S., Akashi, Ryosuke

“…Recently a non-empirical stochastic walker algorithm has been developed to search for the minimum-energy escape paths (MEP) from the minima of the potential…”
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Density Functional Theory for Plasmon-Assisted Superconductivity by Akashi, Ryosuke, Arita, Ryotaro

“…We review the recent progress in the density functional theory for superconductors (SCDFT). Motivated by the long-studied plasmon mechanism of…”
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Strong Bilayer Coupling Induced by the Symmetry Breaking in the Monoclinic Phase of BiS 2 -Based Superconductors by Ochi, Masayuki, Akashi, Ryosuke, Kuroki, Kazuhiko

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Strong Bilayer Coupling Induced by the Symmetry Breaking in the Monoclinic Phase of BiS^sub 2^-Based Superconductors by Ochi, Masayuki, Akashi, Ryosuke, Kuroki, Kazuhiko

“…We perform first-principles band structure calculations for the tetragonal and monoclinic structures of LaO^sub 0.5^Fsub 0.5^BiS^sub 2^. We find that the Bi…”
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