Synthesis, Spectroscopic Characterization, and Observation of Massive MetalInsulator Transitions in Nanowires of a Nonstoichiometric Vanadium Oxide Bronze

Metalinsulator transitions in strongly correlated materials, induced by varying either temperature or dopant concentration, remain a topic of enduring interest in solid-state chemistry and physics owing to their fundamental importance in answering longstanding questions regarding correlation effects. We note here the unprecedented observation of a four-orders-of-magnitude metalinsulator transition in single nanowires of δ-K x V2O5, when temperature is varied, which thus represents a rare new addition to the pantheon of materials exhibiting pronounced metalinsulator transitions in proximity to room temperature.