标题： 场诱导临界性在YbCu4Au中 显示英文标题

标题： Field-Induced Criticality in YbCu4Au

摘要： YbCu4Au是一种独特的材料，同时表现出多种量子涨落。 在本研究中，我们基于全面的微观和宏观测量，包括粉末X射线衍射（XRD）、中子粉末衍射（NPD）、核磁共振、磁化率、电阻率、比热、μ子自旋旋转弛豫（muSR）和X射线吸收光谱（XAS），研究了场诱导的临界性。 YbCu4Au的单晶被生长出来，并通过XRD和NPD测量确定了其晶体结构。 通过比热、电阻率、NPD和muSR测量，在1 T以下观察到了磁性连续转变。 XAS测量进一步表明，在2 T以上Yb离子的价态（+2.93）保持不变。此外，先前研究中观察到的四极频率变化归因于电四极矩，因为在磁场下电四极矩的预期值是有限的[S. Wada等，Journal of Physics: Condensed Matter, 20, 175201 (2008)]。 这些实验结果表明，YbCu4Au在约1 T附近表现出双临界行为，这是由于RKKY相互作用（解释磁相）和Zeeman效应之间的竞争引起的。 显示英文摘要

摘要： YbCu4Au is a unique material exhibiting multiple quantum fluctuations simultaneously. In this study, we investigated the field-induced criticality in YbCu4Au, based on comprehensive micro and macro measurements, including powder X-ray diffraction (XRD), neutron powder diffraction (NPD), nuclear magnetic resonance, magnetization, resistivity, specific heat, muon spin rotation relaxation (muSR), and X-ray absorption spectroscopy (XAS). Single crystals of YbCu4Au were grown, and their crystal structure was determined using XRD, and NPD measurements. Magnetic successive transitions were observed below 1 T by specific heat, resistivity, NPD, and muSR measurements. XAS measurements further indicate that the valence of Yb ions (+2.93) remained unchanged above 2 T. Moreover, the change in quadrupole frequency observed in the previous study is attributable to the electric quadrupole, as the expected value of the electric quadrupole was finite under magnetic fields [S. Wada et al., Journal of Physics: Condensed Matter, 20, 175201 (2008).]. These experimental results suggest that YbCu4Au exhibited bicritical behavior near 1 T, arising from the competition between RKKY interaction, accounting for the magnetic phases, and the Zeeman effect.