论文标题
揭示石墨烯对1T-TAS2的电荷密度波接近效应
Revealing the Charge Density Wave Proximity Effect in Graphene on 1T-TaS2
论文作者
论文摘要
接近效应是一种非常强大的方法，已广泛应用于诱导电子相关性，例如：在异质结构量子材料界面上的超导性，磁性和自旋轨道效应。但是，接近诱导的电荷密度波（CDW）状态仍然难以捉摸。我们报告了沉积在1T-TAS2晶体上的石墨烯层中新型接近诱导的CDW的首次观察。通过使用扫描隧道显微镜和光谱法来探测石墨烯/1T-TAS2异质结构的界面以及理论模型，我们表明，石墨烯中的dirac样载体与1T-TAS2中的相关电子之间的相互作用在1T-TAS2中诱导了在石墨烯中的周期性调整，并在1T-TAS中诱导了1T型元素。 尺寸。我们的结果提供了一个新的平台来操纵异质结构中的电子电荷相关性。
Proximity effect is a very powerful approach and has been widely applied to induce electron correlations such as: superconductivity, magnetism and spin-orbit effects at the interface of heterostructure quantum materials. However, proximity induced charge density wave (CDW) state has remained elusive. We report the first observation of a novel proximity induced CDW within a graphene layer that is deposited on 1T-TaS2 crystal. By using scanning tunneling microscopy and spectroscopy to probe the interface of the graphene/1T-TaS2 heterostructure together with theoretical modeling, we show that the interactions between the Dirac-like carriers in graphene and the correlated electrons in 1T-TaS2 induce a periodic charge density modulation within graphene and modify the band structure at the surface of 1T-TaS2, resulting in a 7.5% reduction of its gap size. Our results provide a new platform to manipulate the electron charge correlations in heterostructures.
