Dynamics and superconductivity in compressed lanthanum superhydride
Hanyu Liu, Ivan I. Naumov, Zachary M. Geballe, Maddury Somayazulu, John S. Tse, Russell J. Hemley
DOI 10.1103/PhysRevB.98.100102 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Recent computational studies have predicted that rare-earth superhydrides are promising high-temperature superconductors. Of these phases having very high hydrogen content (XHn,n>6, where X is the rare-earth atom) a cubic phase of lanthanum hydride, recently synthesized at 170 GPa and identified as LaH10±x, is in good agreement with theoretical predictions. The experiments found that the stability of the phase extended to lower pressure and a distorted form was found on decompression. Here we examine the nuclear quantum effects and anharmonic dynamics on LaH10, including the behavior of the hydrogen sublattice in comparison with the predicted atomic metallic hydrogen at higher pressure. We also examine the vibrational dynamics and electronic properties of a distorted lower pressure phase of LaH10 and find that superconducting Tc decreases relative to cubic but remains relatively high (i.e., 229–245 K).
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LaH10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 275 | 210 GPa | unknown |
| YH10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 305 | 250 GPa | unknown |
| H3S Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 203 | 150 GPa | unknown |
| LaH10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 238 | 200 GPa | unknown |
Similar papers
Evidence for Superconductivity above 260 K in Lanthanum Superhydride at Megabar Pressures
similarity 0.97Maddury Somayazulu et al.
Source status unknown — claims are unverified
Computational materials discovery for lanthanide hydrides at high pressure for high temperature superconductivity
similarity 0.97Evgeny Plekhanov et al.
Source status unknown — claims are unverified
Hydrogen Clathrate Structures in Rare Earth Hydrides at High Pressures: Possible Route to Room-Temperature Superconductivity
similarity 0.96Feng Peng et al.
Source status unknown — claims are unverified
Enhancement of superconducting transition temperature and exotic stoichiometries in the Lu−S system under high pressure
similarity 0.96Juefei Wu et al.
Source status unknown — claims are unverified
Predictions of high-temperature superconducting ternary hydrides under high pressure using density functional calculations
similarity 0.96Bangshuai Zhu et al.
Source status unknown — claims are unverified
Isotope effect in superconducting lanthanum hydride under high compression
similarity 0.96Artur P. Durajski et al.
Source status unknown — claims are unverified