论文标题
PD-SI比对EUPD $ _2 $ si $ _2 $单晶的价值的强大影响
Strong influence of the Pd-Si ratio on the valence transition in EuPd$_2$Si$_2$ single crystals
论文作者
论文摘要
中级Valent Eupd $ _2 $ si $ _2 $的单晶是从Bridgman和Czochralski Technique的欧盟融化中种植的。提取的单晶齿状标本的化学和结构表征沿增长方向产生了Si-PD比的略有变化，并确认存在有限的EU（PD $ _ {1-M} $ SI $ _M $ _M $）$ _ 2 $同型范围。在同一晶体上进行的彻底的物理表征表明，组合物中的这种微小变化强烈影响发生价转换的温度t $ _v $。这些实验表明，在原型价触发系统eupd $ _2 $ si $ _2 $中，结构性和物理性质之间的结构和物理性质之间存在很强的耦合，并解释了T $ _V $的不同报告值。
Single crystals of intermediate valent EuPd$_2$Si$_2$ were grown from an Eu-rich melt by the Bridgman as well as the Czochralski technique. The chemical and structural characterization of an extracted single crystalline Czochralski-grown specimen yielded a slight variation of the Si-Pd ratio along the growth direction and confirms the existence of a finite Eu(Pd$_{1-m}$Si$_m$)$_2$ homogeneity range. The thorough physical characterization carried out on the same crystal showed that this tiny variation in the composition strongly affects the temperature T$_v$ at which the valence transition occurs. These experiments demonstrate a strong coupling between structural and physical properties in the prototypical valence-fluctuating system EuPd$_2$Si$_2$ and explain the different reported values of T$_v$.
