From Cooper-pair glass to unconventional superconductivity: a unified approach to cuprates and pnictides

Abstract

We report a microscopic model wherein the unconventional superconductivity emerges from an incoherent `Cooper-pair glass' state. Driven by the pair-pair interaction, a new type of quasi-Bose phase transition is at work. The interaction leads to the unconventional coupling of the quasiparticles to excited pair states, or `super-quasiparticles', with a non-retarded energy-dependent gap. The model describes quantitatively the quasiparticle excitation spectra of both cuprates and pnictides, including the universal `peak-dip-hump' signatures, and for the pseudogap phase above $T_c$. The results show that instantaneous pair-pair interactions account for the SC condensation without a collective mode.

One reference was corrected

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• Scanning tunneling spectroscopy of high-temperature superconductors
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Cited by in corpus (1)

• The magnon-mediated attraction between two holes doped in a CuO${}_2$ layer