Synthesis, spectroscopic characterization, and observation of massive metal-insulator transitions in nanowires of a nonstoichiometric vanadium oxide bronze.

Patridge, Christopher J; Wu, Tai-Lung; Jaye, Cherno; Ravel, Bruce; Takeuchi, Esther S; Fischer, Daniel A; Sambandamurthy, G; Banerjee, Sarbajit · Nano Lett · 2010

basic_science · Level V

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Abstract

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 delta-K(x)V(2)O(5), 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.