标题： 准一维锯齿形链中的平带和温度驱动的相变 显示英文标题

标题： Flat bands and temperature-driven phase transition in quasi-one-dimensional zigzag chains

摘要： 平坦带材料由于与强关联效应相关的吸引特性而引起了广泛关注。虽然平坦带已在几种二维材料中被发现，但在一维系统中的存在仍然难以捉摸。在这里，我们提出了一种一维的受挫晶格，特别是 zigzag 一维晶格，作为承载平坦带的平台。这种晶格可以通过在 Cu(111) 上生长 CuTe 链来实验实现。通过紧束缚模型分析、第一性原理计算和角分辨光电子能谱测量证实了平坦带的存在。此外，我们发现大约在 250 K 时出现温度驱动的相变。详细分析表明，该系统具有 Tomonaga-Luttinger 液体行为，并伴有自旋-电荷分离效应。我们的工作揭示了在一维极限下研究强关联电子行为和拓扑性质的新前景。 显示英文摘要

摘要： Flat-band materials have garnered extensive attention due to their captivating properties associated with strong correlation effects. While flat bands have been discovered in several types of 2D materials, their existence in 1D systems remains elusive. Here, we propose a 1D frustrated lattice, specifically the 1D zigzag lattice, as a platform for hosting flat bands. This lattice can be experimentally realized by growing CuTe chains on Cu(111). The presence of flat bands was confirmed by tight-binding model analysis, first-principles calculations, and angle-resolved photoemission spectroscopy measurements. In addition, we discovered a temperature-driven phase transition at approximately 250 K. Detailed analyses demonstrate that the system has a Tomonaga-Luttinger liquid behavior, accompanied by spin-charge separation effects. Our work unveils new prospects for investigating strongly correlated electron behaviors and topological properties in the 1D limit.