The mode-mode coupling theory of spin fluctuations in the normal state of high-Tc cuprates is developed on the basis of the itinerant-localized duality picture of technically nested two-dimensional metals. This offers a unified description of the anomalies observed in the normal state of high-Tc cuprates. The so-called "spin-gap'∗ behaviors of the resistivity, the specific heat, the uniform spin susceptibility, and the optical conductivity are characterized by the energy scale T ∗ of the crossover between the itinerant and the localized spin fluctuations, while those of the Hall coefficient, the thermo-electric power, the longitudinal NMR relaxation rate, and the neutron scattering intensity, are characterized by different energy scales less than 71∗. The integrated weight of the nested spin fluctuation decreases when decreasing the temperature or approaching the perfect nesting, leading to the "spin-gap" behavior.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)