论文标题
常规三角形三聚机和费用订单，在csw $ _2 $ o $ $ _6 $的pyrochlore结构中保留安德森条件
Regular-Triangle Trimer and Charge Order Preserving the Anderson Condition in the Pyrochlore Structure of CsW$_2$O$_6$
论文作者
论文摘要
自从在磁铁矿中发现Verwey过渡以来，已对具有pyrochlore结构的过渡金属化合物进行了深入研究，作为实现显着的电子相变的平台。我们报告了一种独特的相转换的发现，该过渡保留了β-甲状腺氧化物CSW $ _2 $ o $ $ _6 $的立方对称性，其中W 5D电子中的每一个都限制在常规三角形W3三角器中。这种三聚体的形成是对D电子的前所未有的自组织，可以将其分解为以非平凡的方式满足Anderson条件的电荷顺序，这是由WO6 octoct octoct octoct octoctrager造成的轨道顺序，并以常规三角形的介绍为旋转旋转的旋转旋转序列。由于pyrochlore氧化物的特征是费米表面的异常三维嵌套以及5D电子特征的局部性质引起的电子不稳定性，在这种独特的电荷轨道旋转耦合现象中起着重要作用。
Since the discovery of the Verwey transition in magnetite, transition metal compounds with pyrochlore structures have been intensively studied as a platform for realizing remarkable electronic phase transitions. We report the discovery of a unique phase transition that preserves the cubic symmetry of the beta-pyrochlore oxide CsW$_2$O$_6$, where each of W 5d electrons are confined in regular-triangle W3 trimers. This trimer formation is an unprecedented self-organization of d electrons, which can be resolved into a charge order satisfying the Anderson condition in a nontrivial way, orbital order caused by the distortion of WO6 octahedra, and the formation of a spin-singlet pair in a regular-triangle trimer. Electronic instability due to the unusual three-dimensional nesting of Fermi surfaces and the localized nature of the 5d electrons characteristic of the pyrochlore oxides were found to play important roles in this unique charge-orbital-spin coupled phenomenon.
