Browsing คณะวิทยาศาสตร์และเทคโนโลยี by Author "Chulalongkorn University. Faculty of Science"

Now showing items 1-9 of 9

Dynamical stabilization and H-vacancy diffusion kinetics of lightweight complex hydrides: Ab initio study for hydrogen storage improvement

Prayoonsak Pluengphon; Prutthipong Tsuppayakorn-aek; Wiwittawin Sukmas; Burapat Inceesungvorn; Thiti Bovornratanaraks (2021)

We present structural stability of new lightweight complex hydrides: Li2BeMgH6, LiNaMg2H6, and LiNaBeMgH6, which correlated to the LiMgH3 (R3c) phase. Lattice dynamic stability, mechanical stability, electronic structure, ...
Effect of substitution on the superconducting phase of transition metal dichalcogenide Nb(SexS1-x)2 van der Waals layered structure

Prutthipong Tsuppayakorn aek; Prayoonsak Pluengphon; Piya Phansuke; Burapat Inceesungvorn; Wutthikrai Busayaporn; Pungtip Kaewtubtim; Thiti Bovornratanaraks (2021)

By means of first-principles cluster expansion, anisotropic superconductivity in the transition metal dichalcogenide Nb(SexS1-x)2 forming a van der Waals (vdW) layered structure is observed theoretically. We show that the ...
Effects of Buffer Layer Growth Temperature on Micro-Structures in the Cubic GaN Films Grown on GaAs (001) Substrates by MOVPE

Pornsiri Wanarattikan; Surang Sumnavadee; Sakuntam Sanorpim; Kentaro Onabe (2017)

c-GaN films on GaAs (001) substrates were investigated using TEM to verify effects of buffer layer growth temperature on micro-structures. Growth temperature of the GaN buffer layer was varied in a range of 550 to 600°C ...
First-principles calculations on superconductivity and H-diffusion kinetics in Mg–B–H phases under pressures

Wiwittawin Sukmas; Prutthipong Tsuppayakorn-aek; Prayoonsak Pluengphon; Stewart J. Clark; Rajeev Ahuja; Thiti Bovornratanaraks; Wei Luo (2023)

Focusing towards ternary metal hydrides has recently been regarded as a new avenue for research in pressure-dependent high-temperature superconductors, thanks highly to a fairly large number of permutations of alloying ...
Lattice dynamic stability and electronic structures of ternary hydrides La1-xYxH3 via first-principles cluster expansion

Prutthipong Tsuppayakorn-aek; Wiwittawin Sukmas; Prayoonsak Pluengphon; Burapat Inceesungvorn; Piya Phansuke; Pungtip Kaewtubtim; Rajeev Ahuja; Thiti Bovornratanaraks; Wei Luo (2022)

Lanthanum hydride compounds LaH3 become stabilized by yttrium substitution under the influence of moderate pressure. Novel materials with a wide range of changes in the structural properties as a function of hydrogen are ...
Lightweight alkali-induced lattice-dynamical stability and energy storage mechanism of quaternary Mg-based hydrides under pressure effect

Prayoonsak Pluengphon; Prutthipong Tsuppayakorn-aek; Auttasit Tubtimtae; Burapat Inceesungvorn; Thiti Bovornratanaraks (2022)

New-discovery compositions of the lightweight quaternary Mg-based hydrides at ambient pressure are found as NaLiMgH4, NaLiMg2H6, and Na3LiMg4H12, which their stabilities were determined by all positive modes of the phonon ...
Pressure-induced lattice-dynamical stability and superconductivity of ternary pentahydride MgNiH5

Prutthipong Tsuppayakorn-aek; Prayoonsak Pluengphon; Wiwittawin Sukmas; Burapat Inceesungvorn; Rajeev Ahuja; Thiti Bovornratanaraks; Wei Luo (2022)

We predict the existence of ternary pentahydride MgNiH5, adopting a hexagonal structure with a space group P63/mmc, at high pressure. Typically, the clarity of structural-phase stability could be demonstrated by thermodynamical ...
Pressure‐Induced Formation of Quaternary Compound and In−N Distribution in InGaAsN Zincblende from Ab Initio Calculation

Prayoonsak Pluengphon; Pornsiri Wanarattikan; Thiti Bovornratanaraks; Burapat Inceesungvorn (2019)

We present the effects of In−N distribution and high pressure on the zincblende phase (0–5 GPa) of InxGa1−xAs0.963N0.037 (x=0.074, 0.111 and 0.148). Structural, electronic, and optical properties are analyzed, and it is ...
Role of anharmonicity in phonon-mediated superconductivity of quasi- van der Waals layered XP2 (X = As, Sb, Bi) structures: Insight from first-principles calculations

Prutthipong Tsuppayakorn-aek; Prayoonsak Pluengphon; Wiwittawin Sukmas; Aparporn Sakulkalavek; Burapat Inceesungvorn; Wei Luo; Thiti Bovornratanaraks (2023)

It is of utmost importance to prioritize the undertaking of investigating superconductivity, as it represents one of the most intriguing and significant phenomena in the field of condensed matter physics. Our research ...

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Browsing คณะวิทยาศาสตร์และเทคโนโลยี by Author "Chulalongkorn University. Faculty of Science"

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