磁场诱导YbCu_{5-x} Au_x的费米液体重入行为和自旋晶格弛豫速率
Magnetic-field-induced reentrance of Fermi-liquid behavior and spin-lattice relaxation rates in YbCu_{5-x}Au_x
摘要：
最近，在观测到的${\rm {YbCu_{5-x}Au_x}}$（$x=0.6$）的磁化率$χ$和μ子和$\rm ^{63}Cu$核自旋-晶格弛豫速率$1/T_1$的异常中，揭示了与朗道-费米液体（LFL）行为的强烈偏离。我们发现，上述异常以及磁场诱导的重入LFL属性确实是由准粒子有效质量的标度行为。我们利用基于费米子凝聚量子相变（FCQPT）概念的方法从理论上得到了标度行为。基于FCQPT方法对实验数据的理论分析不仅统一解释了上述两个实验事实，而且阐明了$\rm YbRh_2Si_2$中纵向磁电阻标度行为的物理原因。
英文摘要：
A strong departure from Landau-Fermi liquid (LFL) behavior have been recently revealed in observed anomalies in both the magnetic susceptibility $χ$ and the muon and $\rm ^{63}Cu$ nuclear spin-lattice relaxation rates $1/T_1$ of ${\rm {YbCu_{5-x}Au_x}}$ ($x=0.6$). We show that the above anomalies along with magnetic-field-induced reentrance of LFL properties are indeed determined by the scaling behavior of the quasiparticle effective mass. We obtain the scaling behavior theoretically utilizing our approach based on fermion condensation quantum phase transition (FCQPT) notion. Our theoretical analysis of experimental data on the base of FCQPT approach permits not only to explain above two experimental facts in a unified manner, but to clarify the physical reasons for a scaling behavior of the longitudinal magnetoresistance in $\rm YbRh_2Si_2$.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
