Coexistence of superconductivity and superionicity in Li2MgH16
Haoran Chen, Junren Shi
DOI 10.1103/PhysRevB.109.L140505 · 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
We study superconductivity in the superionic phase of the clathrate hydride Li2MgH16, where hydrogen ions diffuse among the lattice formed by lithium and magnesium ions. By employing the stochastic path-integral approach, we nonperturbatively take into account the effects of quantum diffusion and anharmonic vibrations. Our calculations reveal strong electron-ion coupling [λ(0)=3.7] and a high superconducting transition temperature (Tc) of 277 K under 260 GPa, at which the material is still superionic. Tc is significantly suppressed compared with the result Tc=473 K obtained from the conventional approach based on the harmonic approximation. Our study, based on a first-principles approach applicable to superionic systems, indicates that the superconductivity and superionicity can coexist in Li2MgH16.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Li2MgH16 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 277 | 260 GPa | unknown |
| Li2MgH16 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 473 | 250 GPa | unknown |
Similar papers
High-Tc superconductors in the ternary Sr-Hf/Zr-H system at high pressure
similarity 0.96Chao Deng et al.
Source status unknown — claims are unverified
Data-driven search for high-temperature superconductors in ternary hydrides under pressure
similarity 0.96Bowen Jiang et al.
Source status unknown — claims are unverified
Superconductivity of electron-doped chalcohydrides under high pressure
similarity 0.96Yu Du et al.
Source status unknown — claims are unverified
Phase diagrams and superconductivity of ternary Na-Al-H compounds at high pressure
similarity 0.96Hao Song et al.
Source status unknown — claims are unverified
Fermi surface topology and anisotropic superconducting gap in electron-doped hydride compounds at high pressure
similarity 0.96Shunwei Yao et al.
Source status unknown — claims are unverified
Prediction of high-Tc superconductivity in ternary actinium beryllium hydrides at low pressure
similarity 0.96Kun Gao et al.
Source status unknown — claims are unverified