Electrically driven metal-insulator switching in δ-KxV2O5 nanowires
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Metal-insulator transition (MIT) in δ-K xV 2O 5 nanowires is studied via tuning temperature, voltage, and current. In the temperature-driven case, a massive drop in resistance over ∼ 4 orders of magnitude at ∼ 380 K is reported [C. J. Patridge, Nano Lett. 10, 2448 (2010)]. Our observation of electrically driven MIT results from a systematic study in any δ M xV 2O 5 system (M is the intercalation ion). In the voltage-driven case, the threshold voltage follows an exponential relation with temperature. In the current-driven case, a negative differential resistance region is observed. These results suggest that δ K xV 2O 5 is an interesting oxide system exhibiting strong electrically driven MIT and will hence be useful in several switching applications. © 2012 American Institute of Physics.
author list (cited authors)
Wu, T., Stabile, A. A., Patridge, C. J., Banerjee, S., & Sambandamurthy, G.