ANALYSIS OF NORMAL STATE PROPERTIES OF HIGH-TC SUPERCONDUCTORS ON THE BASIS OF FERMI-LIQUID THEORY

Fermi liquid theory is developed to discuss normal state properties of high-T(c) superconductors (HTSC). On the basis of a microscopic model composed of d- and p-electrons, we derive the expressions for the specific heat, spin susceptibility, spin-lattice relaxation time T1 and T2-term of electrical resistivity. By insisting consistency among these quantities, we can conclude that spin fluctuations in HTSC are localized in the momentum space in sharp contrast to heavy fermion systems, where spin fluctuations are localized in the real space. Starting with the rigorous expressions derived above, and assuming large antiferromagnetic spin fluctuations in HTSC, we can naturally explain the temperature dependence of the resistivity and T1(-1) observed in the normal state of HTSC.