Prediction of ternary superconducting YCH<sub>12</sub> using a novel solid hydrogen source under high pressure

Fei, Ge; Chen, Xin; Liu, Yunxian; Liu, Xiaobing

doi:10.1039/d2tc04029h

Cited by 4 publications

(1 citation statement)

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“…The electronic properties of AB-(H 2 ) 3 indicated a gradual closure of the band gap with increasing pressure and exhibited T c of 12 K at 240 GPa, primarily driven by acoustic phonon softening mode. In 2022, Fei et al conducted a theoretical investigation on a ternary superconducting compound Y-C-H to identify a potential superconductor that could be synthesized, utilizing adamantane (C 10 H 16 ) as a new solid hydrogen source [141]. The ab initio calculations revealed that the YCH 12 consists of CH 4 motifs, which exhibits an estimated T c of approximately 112 K at 180 GPa.…”

Section: Doping Molecules Into Hydrogen-rich Binary Systemsmentioning

confidence: 99%

Strategies for improving the superconductivity of hydrides under high pressure

Liu,

Wang,

Zhang

et al. 2024

J. Phys.: Condens. Matter

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The successful prediction and confirmation of unprecedentedly high-temperature superconductivity in compressed hydrogen-rich hydrides signify a remarkable advancement in the continuous quest for attaining room-temperature superconductivity. The recent studies have established a broad scope for developing binary and ternary hydrides and illustrated correlation between specific hydrogen motifs and high-Tcs under high pressures. The analysis of the microscopic mechanism of superconductivity in hydrides suggests that the high electronic density of states (DOS) at the Fermi level (EF), the large phonon energy scale of the vibration modes and the resulting enhanced electron-phonon coupling are crucial contributors towards the high-Tc phonon-mediated superconductor. The aim of our efforts is to tackle forthcoming challenges associated with elevating the Tc and reducing the stabilization pressures of hydrogen-based superconductors, and offer insights for the future discoveries of room-temperature superconductors. Our present Review offers an overview and analysis of the latest advancements in predicting and experimentally synthesizing various crystal structures, while also exploring strategies to enhance the superconductivity and reducing their stabilization pressures of hydrogen-rich hydrides.

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Section: Doping Molecules Into Hydrogen-rich Binary Systemsmentioning

confidence: 99%

Strategies for improving the superconductivity of hydrides under high pressure

Liu,

Wang,

Zhang

et al. 2024

J. Phys.: Condens. Matter

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Prediction of potential high-temperature superconductivity in ternary Y–Hf–H compounds under high pressure

Wang,

Jin,

Yang

et al. 2024

Sci Rep

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Compressed ternary alloy superhydrides are currently considered to be the most promising competitors for high-temperature superconducting materials. Here, the stable stoichiometries in the Y–Hf–H ternary system under pressure are comprehensively explored in theory and four fresh phases are predicted: Pmna -YHfH 6 and P 4/ mmm -YHfH 7 at 200 GPa, P 4/ mmm -YHfH 8 at 300 GPa and P -6 m 2-YHfH 18 at 400 GPa. The four Y–Hf–H ternary phases are thermodynamically and dynamically stable at corresponding pressure. In addition, structural features, bonding characteristics, electronic properties, and superconductivity of the four ternary Y–Hf–H phases are systematically calculated and discussed. As the hydrogen content and the density of states of H atoms at the Fermi level increase, the superconducting transition temperatures ( T c ) of Y–Hf–H system are significantly enhanced. The P -6 m 2-YHfH 18 with high hydrogen content exhibits a high calculated T c value of 130 K at 400 GPa.

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Prediction of ternary superconducting YCH₁₂ using a novel solid hydrogen source under high pressure

Abstract: Various hydrogen-rich superconductors have been theoretically predicted under high pressure, such as YH10 with the highest superconducting temperature Tc among the binary compounds. Following the theoretical discoveries, the subsequent experimental...

Cited by 4 publications

References 72 publications

Strategies for improving the superconductivity of hydrides under high pressure

Strategies for improving the superconductivity of hydrides under high pressure

Prediction of potential high-temperature superconductivity in ternary Y–Hf–H compounds under high pressure

High- Tc superconductivity in squeezed cubic CSeH6 and C2
Zhang,
Yu,
Wei
et al. 2024
Phys. Rev. B
6
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Prediction of ternary superconducting YCH12 using a novel solid hydrogen source under high pressure

Abstract: Various hydrogen-rich superconductors have been theoretically predicted under high pressure, such as YH10 with the highest superconducting temperature Tc among the binary compounds. Following the theoretical discoveries, the subsequent experimental...

Cited by 4 publications

References 72 publications

Strategies for improving the superconductivity of hydrides under high pressure

Strategies for improving the superconductivity of hydrides under high pressure

Prediction of potential high-temperature superconductivity in ternary Y–Hf–H compounds under high pressure

High- Tc superconductivity in squeezed cubic CSeH6 and C2Zhang, Yu, Wei et al. 2024Phys. Rev. B6000View full textAdd to dashboardCite

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Prediction of ternary superconducting YCH₁₂ using a novel solid hydrogen source under high pressure

High- Tc superconductivity in squeezed cubic CSeH6 and C2
Zhang,
Yu,
Wei
et al. 2024
Phys. Rev. B
6
0
0
0
View full text Add to dashboard Cite