Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6116, Unites States.
ACS Nano. 2011 Jun 28;5(6):4783-9. doi: 10.1021/nn2007628. Epub 2011 May 27.
Oxide self-assembly is a promising bottom-up approach for fabricating new composite materials at the nanometer length scale. Tailoring the properties of such systems for a wide range of electronic applications depends on the fundamental understanding of the interfaces between the constituent phases. We show that the nanoscale strain modulation in self-assembled systems made of high-T(c) superconducting films containing nanocolumns of BaZrO(3) strongly affects the oxygen composition of the superconductor. Our findings explain the observed reduction of the superconducting critical temperature.
氧化物自组装是一种很有前途的自下而上的方法，可以在纳米尺度上制造新型复合材料。为了广泛的电子应用而对这些系统的性能进行剪裁，取决于对组成相之间界面的基本理解。我们表明，包含 BaZrO(3)纳米柱的高温超导薄膜组成的自组装系统中的纳米尺度应变调制强烈影响了超导体的氧组成。我们的发现解释了观察到的超导临界温度的降低。
