论文标题
订单disorder转换（ca $ _x $ sr $ _ {1-x} $）$ _ 3 $ rh $ _4 $ sn $ _ {13} $
Order-Disorder Transitions in (Ca$_x$Sr$_{1-x}$)$_3$Rh$_4$Sn$_{13}$
论文作者
论文摘要
在特征中，结构相变为位移或秩序的分类通常基于过渡上方的光谱数据。我们使用单晶X射线衍射来调查准 - 饼干材料中的结构相关性（Ca $ _x $ _x $ sr $ _ {1-x} $）$ _ 3 $ _ 3 $ rh $ _4 $ _4 $ sn $ _ {13} $，在$ x \ sim0.9 $中具有量子相变。三维对分布函数表明，局部原子位移的幅度在过渡到过渡范围以下是与温度无关的，并持续到远高于过渡，这是订单序列行为的签名。讨论了对相关电子过渡的影响。
The classification of structural phase transitions as displacive or order-disorder in character is usually based on spectroscopic data above the transition. We use single crystal x-ray diffraction to investigate structural correlations in the quasi-skutterudites, (Ca$_x$Sr$_{1-x}$)$_3$Rh$_4$Sn$_{13}$, which have a quantum phase transition at $x\sim0.9$. Three-dimensional pair distribution functions show that the amplitudes of local atomic displacements are temperature-independent below the transition and persist to well above the transition, a signature of order-disorder behavior. The implications for the associated electronic transitions are discussed.
