Tai-Lung Wu

TL;DR: In this article, the effect of finite size on the phase stability of solid-solution WxV1−xO2 has been studied and it is shown that the depression in phase transition temperature saturates at relatively low dopant concentration in the nanobelts, thought to be associated with the specific sites occupied by the tungsten substitutional dopants.

TL;DR: In this article, an abrupt thermally driven metal-insulator transition (MIT) is observed in these wires and the transition temperature decreases with increasing W content at a pronounced rate of $\ensuremath{-}$(48\char21{}56) K/at.

TL;DR: This study uses individual nanowire Raman microprobe mapping to examine the structural phase progressions underlying the metal-insulator transitions of solution-grown W(x)V(1-x)O(2) nanowires, and suggests the establishment of a coexistence regime within individual Nanowires wherein M1 and R phases simultaneously exist before the percolation threshold is reached and thenanowire becomes entirely metallic.

TL;DR: It is noted 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.

TL;DR: In this paper, twisted bilayer graphene (tBLG) devices with ion gel gate dielectrics are studied using Raman spectroscopy in the twist angle regime where a resonantly enhanced G band can be observed.