| High-temperature superconductors at zero doping can be considered strongly correlated two-dimensional Mott insulators. The understanding of the connection between the superconductor and the Mott insulator hits at the heart of the high-temperature superconducting mechanism. We present a study of the zero-temperature doping-driven evolution of a superconductor towards the Mott insulator in a two dimensional electron model, relevant for high temperature superconductivity. To this purpose we employ a cluster extension of dynamical mean field theory. Our results (arXiv:0808.3948v1) show that a standard (BCS) d-wave superconductor, realized at high doping, is driven into the Mott insulator via an intermediate state displaying non-standard electronoic properties. In particular, we show that at a finite doping a strong momentum-space differentiation takes place: non-Fermi liquid and insulating-like (pseudogap) character rises in some regions (anti-nodes), while Fermi liquid quasiparticles survive in other regions (nodes) of momentum space. We describe the consequence of these happenings on the spectral properties, comparing our results with tunneling experiments, photoemission and magnetotransport on cuprate materials. |
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