Abstract
The critical temperature (TC) and the energy gap (2Δ(T)) for the superconductor SiH4(H2)2 at 250GPa have been calculated. The wide range of the Coulomb pseudopotential's values has been considered: μ⋆∈〈0.1,0.3〉. It has been stated that TC decreases together with the increase of μ⋆ from 129.83K to 81.40K. The low-temperature energy gap (T∼0 K) decreases together with the increase of the Coulomb pseudopotential from 50.96meV to 30.12meV. The high values of 2Δ(0) mean that the dimensionless ratio RΔ≡2Δ(0)/kBTC significantly exceeds the value predicted by the classical BCS theory. In the considered case: RΔ∈〈4.55,4.29〉. Due to the unusual dependence of the critical temperature and the energy gap on μ⋆, the analytical expressions for TC(μ⋆) and Δ(μ⋆) have been given.
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