论文标题
（111）面向挫折的量子pyrochlore薄膜的外延稳定
Epitaxial stabilization of (111)-oriented frustrated quantum pyrochlore thin films
论文作者
论文摘要
令人沮丧的稀土pyrochlore滴定剂，yb $ _2 $ _2 $ _2 $ o $ $ _7 $，tb $ _2 $ _2 $ _2 $ _2 $ o $ $ _7 $是有前途的候选人，以实现量子旋转冰（QSI）。在应用A（111）面向的外部磁场时，已预测多个外来量子相，包括库仑的量子相，包括库仑的量子相，量子价键固体和四极有序。在这里，我们报告了沮丧的量子pyrochlores超薄薄膜的主要成功逐层增长，r $ _2 $ ti $ _2 $ _2 $ o $ _7 $（r = er，yb和tb），沿（111）方向。 我们通过组合方法（包括位于原地Rheed，X射线衍射，相互空间映射和X射线光电子光谱法）来证实它们的高结晶度和适当的化学组成。 带有平面几何形状的大面积（111）面向QSI结构为批量平台提供了新的补充，以探索在准2D限制中的应变和磁场依赖性属性。
Frustrated rare-earth pyrochlore titanates, Yb$_2$Ti$_2$O$_7$, and Tb$_2$Ti$_2$O$_7$ have been proposed as promising candidates to realize quantum spin ice (QSI). Multiple exotic quantum phases, including Coulombic ferromagnet, quantum valence-bond solid, and quadrupolar ordering, have been predicted to emerge in the QSI state upon application of a (111)-oriented external magnetic field. Here, we report on the primal successful layer-by-layer growth of ultra-thin films of frustrated quantum pyrochlores, R$_2$Ti$_2$O$_7$ (R = Er, Yb, and Tb), along the (111) direction. We confirm their high crystallinity and proper chemical composition by a combination of methods, including in-situ RHEED, x-ray diffraction, reciprocal space mapping, and x-ray photoelectron spectroscopy. The availability of large area (111)-oriented QSI structures with planar geometry offers a new complementary to the bulk platform to explore strain and magnetic field dependent properties in the quasi-2D limit.
