Table 7 Quantities important for superconducting calculations, including the electron-phonon coupling constant λ, the logarithmic average of the phonon energy \({\omega }_{\log }\), the critical superconducting temperature T\({}_{c}^{AD}\) based on the Allen-Dynes formula, and the critical superconducting temperature T\({}_{c}^{AD}\) based on the closing of the superconducting gap
From: High-Tc 2D ambient BCS superconductors in hydrogenated transition-metal borides
2D materials | λ | \({\omega }_{\log }\) (meV) | T\({}_{c}^{AD}\) (K) | T\({}_{c}^{ME}\) (K) |
|---|---|---|---|---|
Sc2B2 | 0.19 | 33.6 | 0.0 | |
Y2B2 | 0.23 | 29.3 | 0.0 | |
V2B2 | 0.21 | 26.6 | 0.0 | |
Nb2B2 | 0.23 | 24.7 | 0.0 | |
Sc2B2H | 0.26 | 38.7 | 0.0 | |
Y2B2H | 0.39 | 29.5 | 1.3 | |
V2B2H | 0.27 | 34.8 | 0.0 | |
Nb2B2H | 0.32 | 31.9 | 0.4 | |
Sc2B2H2 | 0.28 | 46.1 | 0.1 | |
Y2B2H2 | 0.43 | 35.4 | 2.7 | |
V2B2H2 | 0.28 | 53.2 | 0.1 | |
Nb2B2H2 | 0.37 | 48.5 | 0.4 | |
Sc2B2H3 | 0.37 | 58.9 | 1.9 | |
Y2B2H3 | 0.49 | 36.1 | 4.7 | |
V2B2H3 | 0.45 | 38.4 | 3.4 | |
Nb2B2H3 | 0.51 | 37.5 | 5.7 | |
Sc2B2H4 | 0.68 | 49.3 | 18.7 | 46 |
Y2B2H4 | 0.41 | 49.5 | 2.7 | |
V2B2H4 | 1.29 | 42.3 | 53.3 | 83 |
Nb2B2H4 | 1.34 | 40.9 | 54.4 | 69 |
