Institute for Nanoscale Science and Engineering and Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235-1807, United States.
Nano Lett. 2011 Mar 9;11(3):1025-31. doi: 10.1021/nl103842v. Epub 2011 Feb 9.
We have measured the size dependence of a solid-solid phase transformation in discrete nanoscale volumes of vanadium dioxide (VO(2)) defined by split-ring resonators. By monitoring the in-coupling plasmonic mode while thermally cycling through the insulator-metal transition, we show that hysteresis width broadens with reduced interrogation volume (i.e., number of intrinsic nucleation sites). The results further imply a volume range over which both electronic and structural components of the switching exhibit similar size dependence.
我们已经测量了由分裂环谐振器定义的离散纳米级二氧化钒（VO(2)）体积中固-固相变的尺寸依赖性。通过在通过绝缘-金属相变时监测内耦合等离子体模式，我们表明滞后宽度随减小的询问体积（即，固有成核位点的数量）而变宽。结果进一步表明，在该体积范围内，开关的电子和结构组件都表现出相似的尺寸依赖性。
