Evidence of a 2D Electron Gas in a Single-Unit-Cell of Anatase TiO₂ (001).

ABSTRACT: The formation and the evolution of electronic metallic states localized at the surface, commonly termed 2D electron gas (2DEG), represents a peculiar phenomenon occurring at the surface and interface of many transition metal oxides (TMO). Among TMO, titanium dioxide (TiO₂ ), particularly in its anatase polymorph, stands as a prototypical system for the development of novel applications related to renewable energy, devices and sensors, where understanding the carrier dynamics is of utmost importance. In this study, angle-resolved photo-electron spectroscopy (ARPES) and X-ray absorption spectroscopy (XAS) are used, supported by density functional theory (DFT), to follow the formation and the evolution of the 2DEG in TiO₂ thin films. Unlike other TMO systems, it is revea

SUBMITTER: Troglia A 

PROVIDER: S-EPMC9165519 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature