论文标题
金属pyrochlore的非弗米液体制度：量子griffiths奇异性
Non-Fermi liquid regime in metallic pyrochlore iridates: Quantum Griffiths singularities
论文作者
论文摘要
我们通过在金属pr_ {2} ir_ {2} o_ {7}中在IR sublattice的化学代替局部矩cr^{3+}，研究了在障碍存在下的近相互作用和rkky耦合的相互作用。我们发现在低温下运输和热力学测量中的非富特液体（NFL）行为的证据。具体而言，磁敏感性在t = 0时表现出功率定律差异。磁敏感性和相关尺度的非分析温度和磁场依赖性表明，存在由近相结合的顺磁性金属组成的两流体系统，与磁有序的稀有区域共存，与量子间相互作用占主导地位，类似于量子关键的格里菲斯相似。
We investigate the interplay of Kondo and RKKY coupling in presence of disorder by chemically substituting local moment Cr^{3+} at the Ir sublattice in the metallic Pr_{2}Ir_{2}O_{7}. We find evidence of non-Fermi liquid (NFL) behaviour in the transport and thermodynamic measurements at low temperature. Specifically, the magnetic susceptibility exhibits power law divergence at T=0. The nonanalytic temperature and magnetic-field dependence of magnetic susceptibility and the associated scaling suggest existence of a two-fluid system consisting of Kondo-screened paramagnetic metal coexisting with magnetically ordered rare regions dominated by inter-impurity interaction, similar to quantum critical Griffiths phase.
