Table 8 Table shows electron-phonon coupling coupling λ, the logarithmic average of the phonon energy \({\omega }_{\log }\), the square average of the phonon energy ω2, and the critical superconducting temperature Tc of listed high-Tc 2D-BCS superconductors at ambient

From: High-Tc 2D ambient BCS superconductors in hydrogenated transition-metal borides

2D-BCS superconductors

λ

\({\omega }_{\log }\) (meV)

ω2 (meV)

Tc (K)

Refs.

Bulk MgB2

0.61

  

39

1

ML MgB2

0.68

  

20

47

    

36 [Exp.]

6

ML h-MgB2

1.46

  

67

36

Mg2B4C2

1.40

62.7

 

46

48

LiCB

0.59

  

70

49

h-LiCB

1.36

  

80

50

Ti2B2H4

1.18

47.3

 

48.6

39

Sc2B2H4

0.68

49.3

68.5

46

This work

V2B2H4

1.29

42.3

58.9

83

This work

Nb2B2H4

1.34

40.9

67.1

69

This work