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.

arXiv commentOne reference was corrected

References in corpus (14)

• Scanning tunneling spectroscopy of high-temperature superconductors
• Visualizing pair formation on the atomic scale in the high-Tc superconductor Bi2Sr2CaCu2O8+d
• Energy gaps in high-transition temperature cuprate superconductors
• The effect of collective spin-1 excitations on electronic spectra in high-Tc superconductors
• Evidence for pairing above Tc from the dispersion in the pseudogap phase of cuprates
• Pseudogap formation above the superconducting dome in iron-pnictides
• Scanning tunneling spectroscopy of superconducting LiFeAs single crystals: Evidence for two nodeless energy gaps and coupling to a bosonic mode
• Local quasiparticle density of states of superconducting SmFeAsO$1-x$F$x$ single crystals: Evidence for spin-mediated pairing
• Constraints on the Quasiparticle Density of States in High-$T_c$ Superconductors
• Strong-coupling analysis of scanning tunneling spectra in Bi${}_2$Sr${}_2$Ca${}_2$Cu${}_3$O${}_{10+\delta }$
• Pairing insights in iron-based superconductors from scanning tunneling microscopy
• Pairing and the phase diagram of the normal coherence length ${\xi }_N(T,x)$ above $T_c$ of $L{a}_{2-x}S{r}_{x}Cu{O}_4$ thin films probed by the Josephson effect
• Pair-pair interactions as a mechanism for high-T${}_c$ superconductivity
• Unconventional temperature dependence of the cuprate excitation spectrum

Cited by in corpus (3)

• Cooper pairs without 'glue' in high-$T_c$ superconductors
• Origin of the Fermi arcs in cuprates: a dual role of quasiparticle and pair excitations
• The magnon-mediated attraction between two holes doped in a CuO${}_2$ layer