Pseudogap in High - Temperature Superconductors
arXiv:cond-mat/0102111 · doi:10.1070/PU2001v044n05ABEH000902
Abstract
This review describes the main experimental facts and a number of theoretical models concerning the pseudogap state in high - temperature superconductors. On the phase diagram of HTSC - cuprates the pseudogap state is observed in the region of current carrier concentrations less than optimal and leads to a number of anomalies of electronic properties. These pseudogap anomalies apparently are due to fluctuations of antiferromagnetic short - range order developing as system moves towards antiferromagnetic region on the phase diagram. Electron interaction with these fluctuations leads to anisotropic renormalization of electronic spectrum and non - Fermi liquid behavior on certain parts of the Fermi surface. We also discuss some simple theoretical models describing basic properties of the pseudogap state, including the anomalies of superconducting state due to pseudogap renormalization of electronic spectrum.
76 pages, 28 figures, RevTeX 4, Physics Uspekhi v.44, No.5 (2001)
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