Predicting superconductivity near 70 K in 1166-type boron-carbon clathrates at ambient pressure
Qingzhuo Duan, Lihui Zhan, Junyu Shen, Xin Zhong, Cheng Lu
DOI 10.1103/PhysRevB.109.054505 · 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 search for a novel superconductor exhibiting a high critical temperature (high Tc) or even near room temperature at an accessible synthetic pressure is a persistent objective for both experimental and theoretical physicists. Here, we conduct a systematic high-throughput structure search on boron-carbon clathrates at ambient pressure and uncover two stable 1166-type superconductors, RbYbB6C6 and RbBaB6C6, both exhibiting maximum Tc∼70 K. The high-Tc superconductivity in 1166-type superconductors is attributed to two key factors: an enhanced density of states at the Fermi level and the strong B-C covalent framework in boron-carbon clathrates, which enhance the electron-phonon coupling and facilitate superconductivity at temperatures near the boiling point of liquid nitrogen. These results provide a significant advancement in understanding the underlying mechanisms of superconductivity in 1166-type boron-carbon based superconductors and offer valuable avenues for the design and synthesis of advanced high-temperature superconductors at ambient conditions.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| RbYbB6C6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 70 | Pressure unresolved | unknown |
| RbBaB6C6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 70 | Pressure unresolved | unknown |
| CaSrB6C6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 31 | Pressure unresolved | unknown |
| KYB6C6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 35 | Pressure unresolved | unknown |
| RbYB6C6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 35 | Pressure unresolved | unknown |
| RbLaB6C6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure unresolved | unknown |
| SrBaB6C6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 42 | Pressure unresolved | unknown |
| Nb3Ge Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 23 | Pressure not reported | unknown |
| H3S Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 204 | 200 GPa | unknown |
| LaH10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 286 | 210 GPa | unknown |
| YH10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 303 | 400 GPa | unknown |
| LaBH8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 156 | 55 GPa | unknown |
| LaBeH8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 185 | 20 GPa | unknown |
| KB2H8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 146 | 12 GPa | unknown |
| La3Ni2O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure not reported | unknown |
Similar papers
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
High-throughput discovery of room-temperature superconductors among complex ternary clathrate hydrides
similarity 0.96Tiancheng Ma et al.
Source status unknown — claims are unverified
Prediction of high-Tc superconductivity under submegabar pressure in ternary actinium borohydrides
similarity 0.96Tingting Gu et al.
Source status unknown — claims are unverified
High-temperature conventional superconductivity in the boron-carbon system: Material trends
similarity 0.95Santanu Saha et al.
Source status unknown — claims are unverified
Predictions of high-temperature superconducting ternary hydrides under high pressure using density functional calculations
similarity 0.95Bangshuai Zhu 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 0.95Feng Peng et al.
Source status unknown — claims are unverified