High-pressure structures and superconductivity of bismuth hydrides

Ma, Yiming; Duan, Defang; Li, Da; Liu, Yunxian; Tian, Fubo; Yu, Hongyu; Xu, Chunhong; Shao, Zongping; Liu, Bingbing; Cui, Tian

doi:10.48550/arxiv.1511.05291

Cited by 7 publications

(13 citation statements)

References 2 publications

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“…In addition, C2/m-BiH 5 was also comprised of linear H 3 units. 329 T c s ranging from 20-119 K have been calculated for these hydrides, and the highest value obtained was for BiH 5 at 300 GPa.…”

Section: Phosphorusmentioning

confidence: 98%

“…15. [326][327][328][329] Fu and co-workers systematically explored the hydrogen rich phase diagram of the hydrides of P, As, and Sb. 326 The crystalline hydrides of phosphorus were found to be unstable with respect to decomposition into the elements between 100-400 GPa, whereas those of arsenic became stable by 300 GPa, and antimony by 200 GPa.…”

Section: Phosphorusmentioning

confidence: 99%

“…328 The hydrides of bismuth were calculated to become stable with respect to the elemental phases above 105 GPa. 328,329 P 6 3 /mmc-BiH contained monoatomic hydrogen atoms, whereas quasi-molecular H 2 units were present within many of the BiH n (n = 2 − 6) phases. In addition, C2/m-BiH 5 was also comprised of linear H 3 units.…”

Section: Phosphorusmentioning

confidence: 99%

“…As a result, each study proposed a somewhat different phase diagram. One thing that they all had in common, however, was the discovery of insulating phases that were Figure 15: Theoretically predicted T c values for hydrides of group 15 elements, including PH n (yellow), [321][322][323][324][325] AsH n (blue), 326 SbH n (pink) [326][327][328] and BiH n (green), 328,329 n = 1 − 8. The T c s provided are the highest ones obtained for the given composition, and may have been calculated at different pressures and using slightly different values of µ * .…”

Section: Oxygenmentioning

confidence: 99%

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The Search for Superconductivity in High Pressure Hydrides

Zarifi

Terpstra

et al. 2019

Reference Module in Chemistry, Molecular Sciences and Chemical Engineering

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The computational and experimental exploration of the phase diagrams of binary hydrides under high pressure has uncovered phases with novel stoichiometries and structures, some which are superconducting at quite high temperatures. Herein we review the plethora of studies that have been undertaken in the last decade on the main group and transition metal hydrides, as well as a few of the rare earth hydrides at pressures attainable in diamond anvil cells. The aggregate of data shows that the propensity for superconductivity is dependent upon the species used to "dope" hydrogen, with some of the highest values obtained for elements that belong to the alkaline and rare earth, or the pnictogen and chalcogen families.

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Section: Phosphorusmentioning

confidence: 98%

Section: Phosphorusmentioning

confidence: 99%

Section: Phosphorusmentioning

confidence: 99%

Section: Oxygenmentioning

confidence: 99%

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The Search for Superconductivity in High Pressure Hydrides

Zarifi

Terpstra

et al. 2019

Reference Module in Chemistry, Molecular Sciences and Chemical Engineering

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“…In the presented work, we have determined the thermodynamic properties of the superconducting state in hydrogenated compounds BiH 5 and BiH 6 . Due to the high predicted value of the electron-phonon coupling constant (λ BiH5 = 1.236 and λ BiH6 = 1.259 [18]) we performed the calculations for both cases as a part of Eliashberg formalism [19]. A detailed description of Eliashberg equations and the computational methods used has been presented in the works [20][21][22][23][24][25][26].…”

mentioning

confidence: 99%

Description of the thermodynamic properties of $\rm{BiH_{5}}$ and $\rm{BiH_{6}}$ superconductors beyond the mean-field approximation

Jarosik,

Drzazga,

Domagalska

et al. 2018

Preprint

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The ab initio calculations suggest (Y. Ma et al.), that the high-pressure (p = 200 GPa) superconducting state in BiH5 and BiH6 compounds characterizes with a high value of the critical temperature (TC ∼ 100 K). Due to the large value of the electron-phonon coupling constant (λ ∼ 1.2), the thermodynamic parameters of the superconducting phase in BiH5 and BiH6 have been determined beyond the mean-field approximation -in the framework of the Eliashberg equations formalism. We have calculated the dependence of the order parameter (∆) and the wave function renormalization factor on the temperature. Then we have estimated the free energy difference between the superconducting state and the normal state, the thermodynamic critical field (HC) and the specific heat of the superconducting state (C S ) and the normal state (C N ). The values of the dimensionless ratios R∆ = 2∆ (0) /kBTC, RC = ∆C (TC ) /C N (TC ) and RH = TC C N (TC) /H 2 C (0) are

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Few‐Hydrogen Metal‐Bonded Perovskite Superconductor MgHCu₃ with a Critical Temperature of 42 K under Atmospheric Pressure

Tian,

He,

Zhu

et al. 2023

Adv Funct Materials

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Since the prediction of multi‐hydrogen high‐temperature superconductor by Ashcroft in 2004, many possible candidates have been proposed, e.g., LaH10 showing the highest superconducting transition temperature (Tc) around 250–260 K at 170‐200 GPa hitherto. However, this pressure is too large to be taken into practical use. To address this challenge, it proposes a few‐hydrogen metal‐bonded perovskite superconductor, MgHCu3, by combining a novel design idea with first‐principles calculations. Different from multi‐hydrogen hydrides, whose high Tc relies on extreme pressure, the metallic bond in few‐hydrogen superconductor MgHCu3 improves the structural stability and ductility at atmospheric pressure. Here, the small amount of hydrogen is found to be vital for Tc. After the incorporation of hydrogen, the electron–phonon coupling constant of MgHCu3 is increased to 0.83, which is larger than that of the well‐known MgB2. Moreover, the anisotropy of MgHCu3 also plays an important role in enhancing Tc. Based on the Migdal‐Eliashberg theory, it predicts that the phonon‐mediated metal‐bonded perovskite MgHCu3 is a superconductor with Tc of 42 K. The first predicted ternary metal‐bonded perovskite, MgHCu3, enriches the family of perovskite and will promote further investigation on few‐hydrogen superconductors under atmospheric pressure.

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High-pressure structures and superconductivity of bismuth hydrides

Cited by 7 publications

References 2 publications

The Search for Superconductivity in High Pressure Hydrides

The Search for Superconductivity in High Pressure Hydrides

Description of the thermodynamic properties of $\rm{BiH_{5}}$ and $\rm{BiH_{6}}$ superconductors beyond the mean-field approximation

Few‐Hydrogen Metal‐Bonded Perovskite Superconductor MgHCu₃ with a Critical Temperature of 42 K under Atmospheric Pressure

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High-pressure structures and superconductivity of bismuth hydrides

Cited by 7 publications

References 2 publications

The Search for Superconductivity in High Pressure Hydrides

The Search for Superconductivity in High Pressure Hydrides

Description of the thermodynamic properties of $\rm{BiH_{5}}$ and $\rm{BiH_{6}}$ superconductors beyond the mean-field approximation

Few‐Hydrogen Metal‐Bonded Perovskite Superconductor MgHCu3 with a Critical Temperature of 42 K under Atmospheric Pressure

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Product

Resources

About

Few‐Hydrogen Metal‐Bonded Perovskite Superconductor MgHCu₃ with a Critical Temperature of 42 K under Atmospheric Pressure