NON FERMI-LIQUID GROUND-STATES IN STRONGLY CORRELATED F-ELECTRON MATERIALS

Experimental efforts to characterize and develop an understanding of non Fermi liquid (NFL) behavior at low temperature in f-electron materials are reviewed for three f-electron systems: M(1-x)U(x)Pd(3) (M = Sc,Y), U1-xThxPd2Al3, and UCu5-xPdx. The emerging systematics of NFL behavior in f-electron systems, based on the present sample of nearly ten f-electron systems, is updated. Many of the f-electron systems exhibit the following temperature dependences of the electrical resistivity rho, specific heal C, and magnetic susceptibility chi for T much less than T-0, where T-0 is a characteristic temperature: rho(T) similar to 1 - aT/T-0, where a < 0 or > 0, C(T)/T similar to (-1/T-0)ln(T/bT(0)), and chi(T) similar to 1 - c(T/T-0)(1/2). In several of the f-electron systems, the characteristic temperature T-0 can be identified with the Kondo temperature T-K.