Table 1 Lattice constants a, DOS at EF (in units of states/eV/Cell), pressure P, the Hopfield parameter NI2 in eV/Å2 for S and H, λ and TC estimated from the McMillan formula.

From: Breakdown of the Migdal approximation at Lifshitz transitions with giant zero-point motion in the H3S superconductor

a (a.u.)

N(EF)

P (GPa)

NI2(S)

NI2(H)

λ

T C (K)

5.4

1.00

300

5.6

4.3

1.0

145

5.6

0.99

215

5.5

4.3

1.0

143

5.8

0.90

150

4.5

3.4

0.81

109

6.0

0.88

95

4.1

3.1

0.73

93

6.2

0.90

50

3.9

2.8

0.70

73

  1. The phonon moments are 600 and 1800 K for S and H, respectively and ωlog is 1500 K.
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