论文标题
在多层fese/srtio $ _3 $电影中，通过拉伸菌株抑制nematicities
Suppression of nematicity by tensile strain in multilayer FeSe/SrTiO$_3$ films
论文作者
论文摘要
以前已经建议通过薄膜厚度减小来增强多层FESE/srtio $ _3 $胶片的列表。在此激发的激励下，关于nematicition和超导性之间的竞争关系进行了许多讨论。但是，确定FESE中列性强度的标准仍然高度争议。因此，人们对nematicity的理解及其与FESE膜中超导性的关系仍然是有争议的。在这里，我们使用分子束外延制造多层FESE/SRTIO $ _3 $胶片，并通过结合角度分辨光发射光谱，核磁共振和扫描隧道显微镜实验来研究列的特性。我们明确地证明，在接口附近，srtio $ _3 $诱导的拉伸菌株抑制了nematicities；在远离界面的整体区域中，列表的强度恢复到大容量值。我们的结果不仅解决了关于多层FESE膜中列的争议，而且还为nematicity和超导性之间的关系提供了宝贵的见解。
The nematicity in multilayer FeSe/SrTiO$_3$ films has been previously suggested to be enhanced with decreasing film thickness. Motivated by this, there have been many discussions about the competing relation between nematicity and superconductivity. However, the criterion for determining the nematicity strength in FeSe remains highly debated. The understanding of nematicity and its relation to superconductivity in FeSe films is therefore still controversial. Here, we fabricate multilayer FeSe/SrTiO$_3$ films using molecular beam epitaxy and study the nematic properties by combining angle-resolved photoemission spectroscopy, nuclear magnetic resonance, and scanning tunneling microscopy experiments. We unambiguously demonstrate that, near the interface, the nematicity is suppressed by the SrTiO$_3$-induced tensile strain; in the bulk region further away from the interface, the strength of nematicity recovers to the bulk value. Our results not only solve the controversy about the nematicity in multilayer FeSe films, but also offer valuable insights into the relationship between nematicity and superconductivity.
