论文标题
多种铜氧化物异质结构的工程超导特性
Engineering superconducting properties of multiferroic copper oxide heterostructures
论文作者
论文摘要
氧化物异质结构反复显示在界面上显示顶端特性，其中一些有利于形成二维电子系统以及高过渡温度超导性。在这项研究中，我们提出了一种新型的异质结构，可以通过用铁电动物的铜酸盐界面中的载体注射来实现接近室温的超导性。使用密度功能理论指导的数字设计方法，对XTIO3/XCUO3/XTIO3的系统进行了彻底检查，从而证实了在氧化热的氧化物界面处的二维电子气体的形成。通过操纵晶格参数，探索了二维电子气体形成的关键成分。我们将簇动态均值场理论应用于氧化热平面，并探测系统XTIO3/XCUO3/XTIO3系统的超导特性。结果，我们看到在完全占领的策略附近的超导订单参数显着增加，这是超导过渡温度的已知标记。
Oxide heterostructures have repeatedly been shown to display apical properties at the interfaces, some of which favorable to the formation of two-dimensional electron systems, as well as high transition temperature superconductivity. In this study, we propose a novel heterostructure to potentially achieve near room-temperature superconductivity, via the carrier injection in cuprate interfaces with ferro-electrics. Using a digital design approach guided by density-functional theory, the systems of XTiO3/XCuO3/XTiO3 are thoroughly examined, confirming the formation of a two-dimensional electron gas at the cuprous oxide interface. Via the manipulation of lattice parameters, the key ingredients for two-dimensional electron gas formation is explored. We apply cluster dynamical mean-field theory on the cuprous oxide plane and probe the superconducting properties of the system XTiO3/XCuO3/XTiO3 . As a result, we see a marked increase of superconducting ordering parameter near the fully occupied regime, a known marker for the superconducting transition temperature.
