非点式方网半金属GdSbTe中无序驱动的电子层列相的直接可视化
Direct Visualization of a Disorder Driven Electronic Smectic Phase in Nonsymmorphic Square-Net Semimetal GdSbTe
AI总结：
本文在弱关联非点式方网半金属GdSbxTe2-x中直接观察到电子层列相，揭示化学替代在CDW-正交结构转变前通过杂质诱导对称破缺，为研究淬火无序、狄拉克费米子与电子关联的相互作用提供了新材料平台。
摘要：
电子液晶（ELC）相是自发性对称破缺态，被认为源于铜氧化物和铁磷族化合物等量子材料中的强电子关联。在此，我们报道了在弱关联的非点式方网半金属GdSbxTe2-x中直接观察到层列相。通过使用光谱成像-扫描隧道显微镜，可视化了非公度层列电荷调制和强烈的局部单向纳米结构，这些结构与跨越费米能级的狄拉克费米子共存。由于具有高迁移率载流子的材料大多是弱关联的，这种ELC相的发现是反常的，并引发了关于其出现起源的问题。具体而言，我们展示了化学替代如何在系统经历电荷密度波（CDW）-正交结构转变之前产生这些对称破缺相。我们的结果强调了杂质在实现ELC相中的重要性，并为探索淬火无序、狄拉克费米子和电子关联之间的相互作用提供了一个新的材料平台。
英文摘要：
Electronic liquid crystal (ELC) phases are spontaneous symmetry breaking states believed to arise from strong electron correlation in quantum materials such as cuprates and iron pnictides. Here, we report a direct observation of a smectic phase in a weakly correlated nonsymmorphic square-net semimetal GdSbxTe2-x. Incommensurate smectic charge modulation and intense local unidirectional nanostructure, which coexist with Dirac fermions across Fermi level, are visualized by using spectroscopic imaging - scanning tunneling microscopy. As materials with highly mobile carriers are mostly weakly correlated, the discovery of such an ELC phase are anomalous and raise questions on the origin of their emergence. Specifically, we demonstrate how chemical substitution generates these symmetry breaking phases before the system undergoes a charge density wave (CDW) - orthorhombic structural transition. Our results highlight the importance of impurities in realizing ELC phases and present a new material platform for exploring the interplay among quenched disorder, Dirac fermions and electron correlation.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
