The high value of the isotope shift in sulfur hydrides supports a phonon-mediated pairing scenario of superconductivity for these high-temperature superconductors which are consistent with the Bardeen–Cooper–Schrieffer (BCS) framework. Knowing that a large electronic density of states enhances the critical temperature ( ), generalized Fermi surface topologies are used to increase it. A multicomponent model within the BCS framework is proposed in this work for sulfur hydride superconductors. This model is used to evaluate some properties of the superconductor. Strong and intermediate coupling effects are taken into account with the effective McMillan approximation, and the isotope coefficient is evaluated as a function of the coupling parameter as well as other relevant parameters of the model.

中文翻译：

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超导硫氢化物的两个重叠带模型示意图：同位素质量指数

硫氢化物同位素位移的高值支持这些高温超导体的声子介导的超导配对方案，这与 Bardeen-Cooper-Schrieffer (BCS) 框架一致。知道大的电子态密度会提高临界温度 ( )，因此可以使用广义费米表面拓扑来提高临界温度 ( )。在这项工作中为硫化氢超导体提出了 BCS 框架内的多组分模型。该模型用于评估超导体的某些特性。有效 McMillan 近似考虑了强和中等耦合效应，并且同位素系数被评估为耦合参数以及模型的其他相关参数的函数。