Compressed hydrides as metallic hydrogen superconductors
@article{Quan2019CompressedHA, title={Compressed hydrides as metallic hydrogen superconductors}, author={Yundi Quan and Soham Ghosh and Warren E. Pickett}, journal={Physical Review B}, year={2019} }
The 2014-2015 prediction, discovery, and confirmation of record high temperature superconductivity above 200K in H$_3$S, followed by the 2018 extension to superconductivity in the 250-280K range in lanthanum hydride, marks a new era in the longstanding quest for room temperature superconductivity: quest achieved, at the cost of supplying 1.5-2 megabars of pressure. Predictions of numerous high temperature superconducting metal hydrides $XH_n$ ($X$=metal) have appeared, but are providing limited…
Figures and Tables from this paper
35 Citations
A perspective on conventional high-temperature superconductors at high pressure: Methods and materials
- Physics
- 2019
Optical properties of superconducting pressurized
LaH10
- Physics
- 2020
Recently superconductivity has been discovered at around 200 K in a hydrogen sulfide system and around 260 K in a lanthanum hydride system, both under pressures of about 200 GPa. These…
High-TC Superconductivity in Hydrogen Clathrates Mediated by Coulomb Interactions Between Hydrogen and Central-Atom Electrons
- PhysicsJournal of Superconductivity and Novel Magnetism
- 2020
The uniquely characteristic macrostructures of binary hydrogen-clathrate compounds $M$H$_\textrm{n}$ formed at high pressure, a cage of hydrogens surrounding a central-atom host, is theoretically…
Multiband nature of room-temperature superconductivity in
LaH10
at high pressure
- Physics, Materials Science
- 2020
Recently, the discovery of room-temperature superconductivity (SC) was experimentally realized in the fcc phase of ${\mathrm{LaH}}_{10}$ under megabar pressures. This SC of compressed…
Second group of high-pressure high-temperature lanthanide polyhydride superconductors
- Materials Science, Physics
- 2020
Rare-earth polyhydrides formed under pressure are promising conventional superconductors, with the critical temperature ${T}_{c}$ in compressed ${\mathrm{LaH}}_{10}$ almost reaching room temperature.…
Anharmonic theory of superconductivity in the high-pressure materials
- Physics
- 2021
Electron-phonon superconductors at high pressures have displayed the highest values of critical superconducting temperature $T_c$ on record, now rapidly approaching room temperature. Despite the…
High-temperature superconductivity on the verge of a structural instability in lanthanum superhydride
- PhysicsNature communications
- 2021
It is determined that the high-symmetry high-temperature superconducting Fm-3m phase of LaH10 can be stabilized at substantially lower pressures than previously thought, and a remarkable correlation between superconductivity and a structural instability indicating that lattice vibrations, responsible for the monoclinic structural distortions in LaH 10, strongly affect the superconducted coupling.
Near-room-temperature superconductivity of Mg/Ca substituted metal hexahydride under pressure
- Physics
- 2020
In search for near-room-temperature superconducting critical temperature of metal superhydrides under high pressure: A review
- Physics
- 2020
An overview and the latest status of the superconductivity of metal superhydrides under high pressure are discussed in this review article. The searching for near-room-temperature superconductors…
References
SHOWING 1-10 OF 60 REFERENCES
What superconducts in sulfur hydrides under pressure and why
- Physics
- 2015
The recent discovery of superconductivity at 190~K in highly compressed H$_{2}$S is spectacular not only because it sets a record high critical temperature, but because it does so in a material that…
Quantum Crystal Structure in the 250 K Superconducting Lanthanum Hydride
- Physics
- 2019
The discovery of superconductivity at 200 K in the hydrogen sulfide system at large pressures [1] was a clear demonstration that hydrogen-rich materials can be high-temperature superconductors. The…
Superconductivity at 250 K in lanthanum hydride under high pressures
- PhysicsNature
- 2019
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.
Tellurium Hydrides at High Pressures: High-Temperature Superconductors.
- PhysicsPhysical review letters
- 2016
The prediction of high-T_{c} superconductivity in tellurium hydrides stabilized at megabar pressures identified by first-principles calculations in combination with a swarm structure search is reported.
High temperature superconductivity in sulfur and selenium hydrides at high pressure
- Physics
- 2015
Abstract
Due to its low atomic mass, hydrogen is the most promising element to search for
high-temperature phononic superconductors. However, metallic phases of hydrogen are only
expected at extreme…
Compressed sodalite-like MgH6 as a potential high-temperature superconductor
- Physics, Materials Science
- 2015
Recently, an experimental work reported a very high Tc of ∼190 K in hydrogen sulphide (H2S) at 200 GPa. The search for new superconductors with high superconducting critical temperatures in…
Superconductive sodalite-like clathrate calcium hydride at high pressures
- PhysicsProceedings of the National Academy of Sciences
- 2012
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.
High-temperature superconductivity in alkaline and rare earth polyhydrides at high pressure: A theoretical perspective.
- PhysicsThe Journal of chemical physics
- 2019
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.
Potential high-Tc superconducting lanthanum and yttrium hydrides at high pressure
- PhysicsProceedings of the National Academy of Sciences
- 2017
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.
Conventional superconductivity at 203 kelvin at high pressures in the sulfur hydride system
- PhysicsNature
- 2015
S sulfur hydride is investigated, and it is argued that the phase responsible for high-Tc superconductivity in this system is likely to be H3S, formed from H2S by decomposition under pressure, which raises hope for the prospects for achieving room-temperature super conductivity in other hydrogen-based materials.