Searching for the thinnest metallic wire

One-dimensional materials have gained much attention in the last decades: from carbon nanotubes to ultrathin nanowires, to few-atom atomic chains, these can all display unique electronic properties and great potential for next-generation applications. Exfoliable bulk materials could naturally provide a source for one-dimensional wires with well defined structure and electronics. Here, we explore a database of one-dimensional materials that could be exfoliated from experimentally known three-dimensional Van-der-Waals compounds, searching metallic wires that are resilient to Peierls distortions and could act as vias or interconnects for future downscaled electronic devices. As the one-dimensional nature makes these wires particularly susceptible to dynamical instabilities, we carefully characterise vibrational properties to identify stable phases and characterize electronic and dynamical properties. Our search identifies several novel and stable wires; notably, we identify what could be the thinnest possible exfoliable metallic wire, CuC₂, coming a step closer to the ultimate limit in materials downscaling.近数十年来，一维材料（one-dimensional materials）受到了广泛关注：从碳纳米管、超薄纳米线到少原子原子链，这类材料均展现出独特的电子特性，在下一代应用中具备巨大潜力。可剥离块体材料天然可作为结构与电子特性明确的一维纳米线的制备来源。本文针对可通过实验已知的三维范德华化合物（Van-der-Waals compounds）剥离得到的一维材料数据库展开研究，旨在筛选出可抵御派尔斯畸变（Peierls distortions）、可作为未来小型化电子器件通孔或互连结构的金属纳米线。由于一维结构特性使得这类纳米线极易受到动力学不稳定性影响，我们对其振动特性进行了细致表征，以确定稳定相并表征其电子与动力学特性。本次筛选发现了多条新型稳定纳米线；尤为值得关注的是，我们找到了迄今最薄的可剥离金属纳米线CuC₂，这一成果向着材料小型化的终极极限迈出了重要一步。

搜集汇总

背景与挑战

背景概述

该数据集聚焦于从已知三维范德华化合物中探索可剥离的一维金属线，旨在寻找抗Peierls畸变、适用于未来微型电子器件的互连材料。研究通过分析振动特性来确保材料稳定性，并识别出新型稳定金属线，其中CuC₂被视作可能的最薄可剥离金属线，推动材料微型化极限。