论文标题
使用对比磁截面标志区分偶极和八极极量子旋转。
Distinguishing dipolar and octupolar quantum spin ices using contrasting magnetostriction signatures
论文作者
论文摘要
最近，CE $ _2 $ zr $ _2 $ o $ _7 $和ce $ _2 $ sn $ _2 $ _2 $ o $ _7 $进行了许多实验，这表明这些材料携带具有三维量子旋转液体，带有紧急光子和分数旋振兴奋。但是，确定量子自旋液体确切性质的数据的解释仍在争论中。 CE $^{3+} $本地时刻的Kramers Doublet提供了不寻常的伪旋转自由度，因为$ x $和$ z $组件会变换为偶极子，而$ y $ y $组件则为八键。这导致在Ce $^{3+} $矩的pyrochlore晶格上各种可能的量子自旋液体（或量子自旋冰）相。在这项工作中，我们从理论上提出，磁截图将能够区分偶极性（O-QSI）量子式旋转冰，其中偶极或八度分量具有相应的自旋冰相关性。我们表明，各种配置中的磁截图不仅可以用作选择规则，不仅可以区分D-QSI和O-QSI，还可以区分许多竞争性的破碎对称状态。
Recently there have been a number of experiments on Ce$_2$Zr$_2$O$_7$ and Ce$_2$Sn$_2$O$_7$, suggesting that these materials host a three-dimensional quantum spin liquid with emergent photons and fractionalized spinon excitations. However, the interpretation of the data to determine the precise nature of the quantum spin liquids is still under debate. The Kramers doublet in Ce$^{3+}$ local moment offers unusual pseudo-spin degrees of freedom as the $x$ and $z$ components transform as a dipole and $y$ component as an octupole. This leads to a variety of possible quantum spin liquid (or quantum spin ice) phases on the pyrochlore lattice of Ce$^{3+}$ moments. In this work, we theoretically propose that magnetostriction would be able to distinguish the dipolar (D-QSI) and octupolar (O-QSI) quantum spin ice, where the dipolar or octupolar components possess the respective spin ice correlations. We show that the magnetostriction in various configurations can be used as a selection rule to differentiate not only D-QSI and O-QSI, but also a number of competing broken symmetry states.
