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首页> 外文期刊>Solid State Communications >Non-Fermi-liquid behavior in single-crystal CaRuO3: Comparison to ferromagnetic SrRuO3
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Non-Fermi-liquid behavior in single-crystal CaRuO3: Comparison to ferromagnetic SrRuO3

机译：Non-Fermi-liquid behavior in single-crystal CaRuO3: Comparison to ferromagnetic SrRuO3

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摘要

We report calorimetric, magnetic and electric transport properties of single-crystal CaRUO3 and SrRuO3 as a function of temperature T and applied magnetic field B. We find that CaRuO3 is a non-Fermi-liquid metal near a magnetic instability, as characterized by the following properties: (1) the heat capacity C(T, B) similar to -T log T is readily enhanced in low applied fields, and exhibits a Schottky peak at 2.3 K that exhibits field dependence when T is reduced: (2) the magnetic susceptibility diverges as T-gamma at low temperatures with 1/2 < gamma < 1, depending on the applied field; and (3) the electrical resistivity exhibits a T-3/2 dependence over the range 1.7 < T < 24 K. No Shubnikov-de Haas oscillations are discerned at T = 0.65 K for applied fields up to 45 T. These properties, which sharply contrast those of the itinerant ferromagnet SrRuO3, indicate CaRuO3 is a rare example of a stoichiometric oxide compound that exhibits non-Fermi-liquid behavior near a quantum critical point.

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