Superconductivity of Heavy Fermions in Valence Fluctuating Systems

概要

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On the basis of the Fermi liquid description of the normal state, singlet (.s'-symmetry) superconductivity in the Kondo lattice is examined near its transitiontemperature. For the criterion of superconductivity, a focus is given on thecompetition between the pair weakening force due to the spin fluctuation and theattractive interaction between neighboring f electrons. This competition explainsthat a-Ce is a normal Fermi liquid under ambient pressures, while it becomessuperconducting under high pressures. It is also argued that singlet superconduc-tivity is likely to be realized in CeCu.Si. from the pressure dependence of thetransition temperature, or the dependence of the transition temperature on theKondo temperature.
社団法人日本物理学会の論文
1984-10-15