论文标题
通过改变SRTIO3表面的化学排列来重建低维电子状态
Reconstruction of low dimensional electronic states by altering the chemical arrangement at the SrTiO3 surface
论文作者
论文摘要
开发可靠的方法来调节SRTIO3中二维电子气体（2DEG）的电子结构对于利用其全部潜力和诱导新型特性至关重要。在这里，我们表明，相对简单的表面制备重建了SRTIO3（STO）表面的2DEG，从而导致Lifshitz样过渡。结合了诸如角度分辨光发射光谱（ARPE）和X射线光发射光谱（XP）的实验方法以及从头算的计算，我们发现表面带结构的调节主要归因于化学成分的重组。此外，ARPES实验表明，可以有效地使用真空紫外线（VUV）光，以改变2DEG系统的带状重新归一化并控制电子 - Phonon相互作用（EPI）。我们的研究提供了一条强大而直接的途径，可通过STO表面的化学退化稳定和调整低维电子结构。
Developing reliable methods for modulating the electronic structure of the two-dimensional electron gas (2DEG) in SrTiO3 is crucial for utilizing its full potential and inducing novel properties. Here, we show that relatively simple surface preparation reconstructs the 2DEG of SrTiO3 (STO) surface, leading to a Lifshitz-like transition. Combining experimental methods, such as angle-resolved photoemission spectroscopy (ARPES) and X-ray photoemission spectroscopy (XPS) with ab initio calculations, we find that the modulation of the surface band structures is primarily attributed to the reorganization of the chemical composition. In addition, ARPES experiments demonstrate that vacuum ultraviolet (VUV) light can be efficiently employed to alter the band renormalization of the 2DEG system and control the electron-phonon interaction (EPI). Our study provides a robust and straightforward route to stabilize and tune the low-dimensional electronic structure via the chemical degeneracy of the STO surface.
