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Dependence of the critical temperature and disorder in holographic superconductors on superfluid density

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arXiv:2312.16029v3 Announce Type: replace-cross
Abstract: Recent experiments strongly indicate deep connections between transports of strange metal and high $T_c$ superconductors. For example, the dependence of the zero-temperature phase stiffness on the critical superconducting temperature is generally linear, which is incompatible with the standard Bardeen-Cooper-Schrieffer description. We develop an analytical method for AC conductivity calculation and explore the scaling relations among superconducting critical temperature, superfluid density, and momentum dissipation strength for the Gubser-Rocha model with extensions in the probe limit. In the normal phase, we show that the critical temperature is proportional to the momentum dissipation strength in a certain parameter range, which is universal in holographic models. In the superconducting phase, studying the AC conductivity analytically and numerically, we find linear dependence of zero-temperature superfluid density (phase stiffness) on the critical superconducting temperature, which is consistent with recent experiments of high $T_c$ superconductors. These results further underpin the deep connections between strange metal and high $T_c$ superconductors.

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