Visualization of the local insulator-metal transition in Pr0.7Ca0.3MnO3
Visualization of the local insulator-metal transition in Pr0.7Ca0.3MnO3
复制标题
DOI：
10.1126/science.280.5371.1925
复制
发表时间：
1998-06-19
期刊：
影响因子：
56.9
通讯作者：
Tokura, Y
中科院分区：
文献类型：
--
作者：
Fiebig, M;Miyano, K;Tokura, Y
在“巨磁阻”化合物Pr0.7Ca0.3MnO3中，光诱导绝缘体-金属转变产生了一个良好的局部化导电路径，而大部分样品保持绝缘。路径可以通过伴随相变的反射率变化来可视化。它的可见性为深入了解具有强磁相关性的材料中的电子输运提供了工具。例如，一个导电路径可以仅仅因为另一个路径的存在而在任意位置产生或移除。这种操作在光开关的构造中可能是有用的。
The light-induced insulator-metal transition in the "colossal magnetoresistance" compound Pr0.7Ca0.3MnO3 is shown to generate a well-localized conducting path while the bulk of the sample remains insulating. The path can be visualized through a change of reflectivity that accompanies the phase transition. Its visibility provides a tool for gaining insight into electronic transport in materials with strong magnetic correlations. For example, a conducting path can be generated or removed at an arbitrary position just because of the presence of another path. Such manipulation may be useful in the construction of optical switches.