Is CaRuO_3 a non-Fermi liquid metal?

摘要

We measured the resistivity #rho# and magnetoresistance #DELTA##rho#/#rho# of the metallic pseudoubic perovskite CaRuO_3. At high temperatures #rho# = a + b T~(0.5) and #DELTA##rho#/#rho# is negative. At low temperatures #rho# = a + bT~(1.5) and #DELTA##rho#/#rho# is non-monotonic. Both at high and low temperatures #rho# deviates strongly from the resistivity of Fermi liquid metals, suggesting that CaRuO_3 is a non-Fermi liquid metal.