Quasilocal critical nature of cooperative paramagnetic fluctuations in CaRuO3 metal

Article

关键词: FERMI-LIQUID BEHAVIOR;    MAGNETIC-PROPERTIES;    SPIN FLUCTUATIONS;    SRRUO3;   

DOI  :  10.1103/PhysRevB.91.241103

来源: SCIE

【 摘 要 】

We report the observation of cooperative paramagnetic fluctuations of Ru4+ spins that coexist with the non-Fermi-liquid state in CaRuO3 perovskite below T similar or equal to 21 K. Detailed electrical, magnetic, and neutron scattering measurements reveal that the Ru4+ ions reside in magnetic-field-independent random domains with dynamic properties that are reminiscent of the cooperative paramagnetic fluctuations. The linear (E/T) scaling of the dynamic susceptibilities and divergence of the mean relaxation time as T -> 0 K suggest a quasilocal critical nature of the spin fluctuations. We argue that the non-Fermi-liquid behavior arises due to the quantum critical nature of the cooperative paramagnetic fluctuations in CaRuO3.

【 授权许可】

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