$\mathrm{NaYb}{\mathrm{O}}_2$ has been reported as a possible host for the quantum spin-liquid state. Here, the composition-dependent polycrystalline $\mathrm{N}{\mathrm{a}}_{1\text{−}x}\mathrm{Yb}{\mathrm{O}}_2$ ($x=0$, 0.03, and 0.07) has been investigated by combining high-field magnetizations and inelastic neutron scattering techniques. For the $x=0$ sample, no signature of a magnetic order is observed down to 0.3 K. Inelastic neutron scattering measurement suggests a continuous low-energy excitation spectrum centered at momentum transfer $\left(Q\right)\sim 1.25{\AA }^{-1}$ and extending up to energy transfer ($E$) ∼ 2.0 meV. In contrast, $x=0.03$ and 0.07 samples exhibit magnetic transitions at 1.1 and 2.3 K, respectively. High-field magnetization measurements indicate similar behaviors for $x=0$ and 0.03 samples including plateaulike features at the 1/3 saturated magnetization, which implies that the spin disorder in the $x=0$ sample might be suppressed preceding the emergence of the up-up-down phase. This composition- and field-dependent study allows us to construct complete phase diagrams indicating that $\mathrm{NaYb}{\mathrm{O}}_2$ is a promising candidate for the quantum spin-liquid state in close proximity to the antiferromagnetic instability tuned by the application of magnetic fields as well as controlling the concentration of $\mathrm{N}{\mathrm{a}}^{+}$ ion vacancies.

中文翻译：

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量子自旋液体候选物NaYbO2中的磁场和成分调谐反铁磁不稳定性

$钠{\mathrm{Ø}}_2$据报道，它可能是量子自旋液体态的宿主。在这里，取决于成分的多晶$\mathrm{ñ}{\mathrm{一种}}_{\mathrm{1个}\text{-}X}b{\mathrm{Ø}}_2$ （$X=0$，0.03和0.07）已通过结合高场磁化强度和非弹性中子散射技术进行了研究。为了$X=0$ 样品，直到0.3 K都没有观察到磁阶的信号。非弹性中子散射测量表明，以动量传递为中心的连续低能量激发谱 $（问）〜1.25{\mathrm{一种}}^{-\mathrm{1个}}$ 并扩展到能量传递（$Ë$）〜2.0 meV。相反，$X=0.03$0.07和0.07的样品分别在1.1和2.3 K处显示出磁跃迁。高场磁化强度测量表明类似行为$X=0$ 和0.03个样品在1/3的饱和磁化强度处具有高原样特征，这表明样品中的自旋无序 $X=0$样品在上-下-下阶段出现之前可能被抑制。这项与成分和场有关的研究使我们能够构建完整的相图，表明$钠{\mathrm{Ø}}_2$ 是量子自旋液体态的一个有前途的候选者，它紧邻通过施加磁场以及控制浓度来调节的反铁磁不稳定。 $\mathrm{ñ}{\mathrm{一种}}^{+}$ 离子空位。