Enhanced Phonon-Phonon Interactions and Weakened Electron-Phonon Coupling in Charge Density Wave Topological Semimetal EuAl with a Possible Intermediate Electronic State.

The origin of the charge density wave (CDW) is a long-term open issue. Furthermore, the evolution of phonon-phonon interactions (PPIs) across CDW transitions has rarely been investigated. Whether electron-phonon coupling (EPC) would be weakened or enhanced after CDW transitions is still under debate.

Plasma-induced oxygen vacancies enabled ultrathin ZnO films for highly sensitive detection of triethylamine.

Metal oxide semiconductor (MOS) thin films hold great promise for electronic devices such as gas sensors. However, the low surface activity of pristine MOS often leads to inferior sensitivity and the sensitization mechanism of ultrathin MOS films has received rare attention. Herein, we report a high performance gas sensor based on plasma-etched ZnO thin films.