论文标题
在原子上稀薄的高温BI_ {2.1} sr_ {1.9} cacu_ {2.0} o_ {8+Δ}超导体超导体中，在空间相关的不相关的晶格调制
Spatially correlated incommensurate lattice modulations in an atomically thin high-temperature Bi_{2.1}Sr_{1.9}CaCu_{2.0}O_{8+δ} superconductors
论文作者
论文摘要
在铜矿平面的铜氧平面上，铜酸盐不同家族的超导临界温度的巨大变化表明，晶格调节效应的重要性。 BI_2SR_2CACU_2O_ {8+Y}的一维不固定晶格调制（ILM），其平均原子位置在单位单元格之外扰动，为研究超导性和纵向远程和纵向型线酸酯latteral lotteral latteral latteral latteral latte latte fluctuations提供了理想的测试场。在这里，我们报告了BI_ {2.1} SR_ {1.9} CACU_ {2.0} O_ {8+δ} van der wa der waals waals waals waals waals waals waals gerations的厚度厚度的厚度厚度的厚度，扫描Nano X射线衍射（SNXRD）成像不固定的晶格调制成像。使用SNXRD，我们探测在散装样品表面中的远距离和短距离晶格调制，空间分辨率低于100 nm。我们发现，大小的水坑状域均匀地随维度而变化。在2个单元的细胞薄样品中，可以观察到长距离和短距离订单的波形与具有方向梯度的新兴空间模式抗相关。新兴模式起源于晶格菌株的微小调整，诱导静态介观荷马密度波。因此，我们的发现表明，该应变可用于调整和控制二维高温超导体的电磁特性。
Strong variations in superconducting critical temperatures in different families of the cuprate perovskites, even with similar hole doping in their copper-oxygen planes, suggest the importance of lattice modulation effects. The one-dimensional incommensurate lattice modulation (ILM) of Bi_2Sr_2CaCu_2O_{8+y}, with the average atomic positions perturbed beyond the unit cell, offers an ideal test ground for studying the interplay between superconductivity and the long-range incommensurate lattice fluctuations. Here we report Scanning nano X-ray Diffraction (SnXRD) imaging of incommensurate lattice modulations in Bi_{2.1}Sr_{1.9}CaCu_{2.0}O_{8+δ} Van der Waals heterostructures of thicknesses down to two-unit cells. Using SnXRD, we probe that the long-range and short-range incommensurate lattice modulations in bulk sample surface with spatial resolution below 100 nm. We find that puddle-like domains of ILM of size uniformly evolving with dimensionality. In the 2-unit cell thin sample, it is observed that the wavevectors of the long- and short-range orders become anti-correlated with emerging spatial patterns having a directional gradient. The emerging patterns, originated by tiny tuning of lattice strain, induce static mesoscopic charge density waves. Our findings thus demonstrate that the strain can be used to tune and control the electromagnetic properties of two-dimensional high-temperature superconductors.
