FERMI-LIQUID THEORY ON HEAVY ELECTRON-SYSTEMS

Theory of heavy electron is reviewed on the basis of the Fermi liquid theory. The importance of the orbital degeneracy in realizing the heavy electrons is stressed by using the scaling theory on the Kondo temperature. With use of the periodic Anderson Hamiltonian, the expressions for the physical quantities, such as electronic specific heat, magnetic susceptibility, conductivity, relaxation time of nuclear spin and anomalous Hall coefficient are derived. These results explain the essential properties of heavy electrons. For further development the extension to the orbital degenerate case is essential and discussed mainly on the specific heat and the susceptibility. At the end the relation between the Fermi liquid state and spin fluctuation is discussed with use of the orthogonality theorem.