High-temperature superconductivity in clathrate thorium-doped hexahydrides A1−xThxH6 (A = La, Ac, and Y) at moderate pressure
Wenxuan Chen, Tiancheng Ma, Zihao Huo, Hongyu Yu, Tian Cui, Defang Duan
DOI 10.1103/PhysRevB.109.224505 · 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
The discovery of high-temperature superconductivity in hydrides provides a promising route to achieve the goal of room-temperature superconductivity, but the ultrahigh pressure required to be synthesized severely limits their application. The next challenge is to find novel hydrides with high Tc at low pressure, even ambient pressure. Here, we propose a strategy that elements with little electronegativity, large atomic volume, and suitable valence electron number can be regarded as a candidate for reducing the stable pressure by summarizing the superconducting rules of the clathrate hexahydrides, and find that thorium is a good “precompressor.” Based on the above strategy, we doped thorium into clathrate hexahydrides with a H24 cage, and designed a series of hydrides. They could be dynamically stable at moderate pressure, which is much lower than that of the well-known hexahydrides CaH6. Remarkably, LaTh3H24, AcTh3H24, and YThH12 exhibit excellent superconductivity with high Tc of 198 K at 50 GPa, 201 K at 60 GPa, and 208 K at 60 GPa, respectively. This work suggests that thorium doping is an effective method for finding hydrides with high Tc at moderate pressure, and successfully helps us design a series of interesting high-temperature superconducting hydrides.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LaTh3H24 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 198 | 50 GPa | unknown |
| AcTh3H24 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 201 | 60 GPa | unknown |
| YThH12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 208 | 60 GPa | unknown |
| YTh2H18 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 199 | 60 GPa | unknown |
| LaTh2H18 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 199 | 70 GPa | unknown |
| LaThH12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 231 | 100 GPa | unknown |
| AcThH12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 243 | 110 GPa | unknown |
| AcTh2H18 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 203 | 90 GPa | unknown |
| Y2ThH18 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 211 | 150 GPa | unknown |
| ThH6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 159 | 50 GPa | unknown |
| YH6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 224 | 166 GPa | unknown |
| LaBeH8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 110 | 80 GPa | unknown |
| CaH6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 235 | 150 GPa | unknown |
Similar papers
Superconductivity in compressed ternary alkaline boron hydrides
similarity 0.96Simin Li et al.
Source status unknown — claims are unverified
Second group of high-pressure high-temperature lanthanide polyhydride superconductors
similarity 0.95Weiguo Sun et al.
Source status unknown — claims are unverified
Substitution of Y, Ce, and Th for La in LaBeH8 as a path towards lower synthesis pressures of superconducting hydrides
similarity 0.95Yuan Ma et al.
Source status unknown — claims are unverified
Ambient-pressure high-Tc superconductivity in doped boron-nitrogen clathrates La(BN)5 and Y(BN)5
similarity 0.95Han-Bin Ding et al.
Source status unknown — claims are unverified
Structure, stability, and superconductivity of N-doped lutetium hydrides at kbar pressures
similarity 0.95Katerina P. Hilleke et al.
Source status unknown — claims are unverified
Theoretical investigation of superconductivity in quaternary double perovskite hydrides at moderate pressure
similarity 0.95Min Wang et al.
Source status unknown — claims are unverified