Toward Simple Theory of High-Tc Superconductivity.

Understanding High Tc Superconductivity ∗.

I briefly review several key issues in understanding the cuprate superconductors from the point of view of doped-Mott-insulator. Then I present an effective low-energy theory and show that the phase diagram of such a model includes an anti-ferromagnetic (AF) phase, a superconducting state, and a pseudogap phase at low doping and low temperature, consistent with the experimental one. The dual to...

Understanding High Tc Superconductivity ∗.

I briefly review several key issues in understanding the cuprate superconductors from the point of view of doped-Mott-insulator. Then I present an effective low-energy theory and show that the phase diagram of such a model includes an anti-ferromagnetic (AF) phase, a superconducting state, and a pseudogap phase at low doping and low temperature, consistent with the experimental one. The dual to...

Perturbation Theory of High-Tc Superconductivity in Iron Pnictides

High-transition-temperature superconductivity discovered recently in iron pnictides is analyzed within a perturbation theory. Specifically, the probable pairing symmetry, the doping dependence of the transition temperature and a pairing mechanism etc. are studied by solving the Eliashberg equation for many-band(2and 5-band) Hubbard models with realistic electronic structures. The effective pair...

Striping in High Tc Superconductivity

Possible origins of high-Tc superconductivity.