论文标题
电子相关驱动的金属绝缘体过渡，扭曲和无序的VO2膜
Electron Correlation driven Metal-Insulator transition in Strained and Disordered VO2 films
论文作者
论文摘要
VO2中的金属胰蛋白过渡（MIT）的特征是晶格，电子和轨道自由度之间的复杂相互作用。在这一贡献中，我们研究了轨道层次结构的应变调节以及对VO2金属阶段宏观特性的影响，例如费米水平（FEL）种群（FL）种群和金属性，即通过温度依赖X射线吸收近距离吸收结构（Xanes）和Resonant Photosemoscopy（Xanes）筛选电场的物质能力（构成电场）。我们证明，紧张的VO2中的MIT是填充控制类型的，因此它是由电子相关效应产生的。此外，我们表明纳米结构（NS）无序的VO2中的MIT是由电子相关驱动的。因此，对相关的微调可以导致过渡特征的精确控制和调整。
The Metal-Insulator transition (MIT) in VO2 is characterized by the complex interplay among lattice, electronic and orbital degrees of freedom. In this contribution we investigated the strain-modulation of the orbital hierarchy and the influence over macroscopic properties of the metallic phase of VO2 such as Fermi Level (FL) population and metallicity, i.e., the material ability to screen an electric field, by means of temperature-dependent X-ray Absorption Near Edge Structure (XANES) and Resonant Photoemission spectroscopy (ResPES). We demonstrate that the MIT in strained VO2 is of the Filling Control type, hence it is generated by electron correlation effects. In addition, we show that the MIT in Nanostructured (NS) disordered VO2, where the structural phase transition is quenched, is driven by electron correlation. Therefore a fine tuning of the correlation could lead to a precise control and tuning of the transition features.
