Prediction of high- Tc superconductivity in ternary lanthanum borohydrides

@article{Liang2021PredictionOH,
  title={Prediction of high-
Tc
 superconductivity in ternary lanthanum borohydrides},
  author={Xiao Qiang Liang and Aitor Bergara and Xianggang Wei and Xiaoxu Song and Linyan Wang and Rongxin Sun and Hanyu Liu and Russell J. Hemley and Lin Wang and Guoying Gao and Yongjun Tian},
  journal={Physical Review B},
  year={2021}
}
The study of superconductivity in compressed hydrides is of great interest due to measurements of high critical temperatures (Tc) in the vicinity of room temperature, beginning with the observations of LaH10 at 170-190 GPa. However, the pressures required for synthesis of these high Tc superconducting hydrides currently remain extremely high. Here we show the investigation of crystal structures and superconductivity in the La-B-H system under pressure with particle-swarm intelligence structure… 

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References

SHOWING 1-10 OF 74 REFERENCES
Potential high-Tc superconducting lanthanum and yttrium hydrides at high pressure
TLDR
The study suggests that dense hydrides consisting of lanthanum and yttrium and related hydrogen polyhedral networks may represent new classes of potential very high-temperature superconductors.
Superconductivity up to 243 K in yttrium hydrides under high pressure
The discovery of high-temperature conventional superconductivity in H3S with a critical temperature of Tc=203 K was followed by the recent record of Tc ~250 K in the face-centered cubic (fcc)
Superconductivity at 250 K in lanthanum hydride under high pressures
TLDR
A lanthanum hydride compound at a pressure of around 170 gigapascals is found to exhibit superconductivity with a critical temperature of 250 kelvin, the highest critical temperature that has been confirmed so far in a superconducting material.
High-temperature superconductivity in alkaline and rare earth polyhydrides at high pressure: A theoretical perspective.
TLDR
This Perspective focuses on the alkaline earth and rare earth polyhydrides whose superconducting critical temperature, Tc, was predicted to be above the boiling point of liquid nitrogen.
Conventional superconductivity at 190 K at high pressures
The highest critical temperature of superconductivity Tc has been achieved in cuprates: 133 K at ambient pressure and 164 K at high pressures. As the nature of superconductivity in these materials is
Room-temperature superconductivity in a carbonaceous sulfur hydride.
TLDR
Superconductivity is reported in a photochemically transformed carbonaceous sulfur hydride system, starting from elemental precursors, with a maximum superconducting transition temperature of 287.7 ± 1.2 kelvin.
Quantum crystal structure in the 250-kelvin superconducting lanthanum hydride
TLDR
Quantum atomic fluctuations have a crucial role in stabilizing the crystal structure of the high-pressure superconducting phase of lanthanum hydride and are crucial for the stabilization of solids with high electron–phonon coupling constants that could otherwise be destabilized by the large electron– phonon interaction, thus reducing the pressures required for their synthesis.
Synthesis of clathrate cerium superhydride CeH9 at 80-100 GPa with atomic hydrogen sublattice
TLDR
It is shown that CeH9 can be synthesized at 80-100 GPa with laser heating, and is characterized by a clathrate structure with a dense 3-dimensional atomic hydrogen sublattice, which shed a significant light on the search for superhydrides in close similarity with atomic hydrogen within a feasible pressure range.
Pressure-stabilized superconductive yttrium hydrides
TLDR
The search for high-temperature superconductors has been focused on compounds containing a large fraction of hydrogen, such as SiH4(H2)2, CaH6 and KH6, but two new yttrium hydrides (YH4 andYH6), which are stable above 110 GPa are predicted, which are higher than the predicted maximal Tc of 40 K in YH3.
Superconductive sodalite-like clathrate calcium hydride at high pressures
TLDR
In the stoichiometry CaH6 a body-centered cubic structure with hydrogen that forms unusual “sodalite” cages containing enclathrated Ca stabilizes above pressure 150 GPa, and the resultant dynamic Jahn–Teller effect helps to enhance electron–phonon coupling and leads to superconductivity of CaH 6.
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