Conduction and local breakdown mechanisms in conductive channels at interfaces

In the present project we want to investigate the conduction and breakdown mechanisms occurring in local conduction channels created by a polarized near field tip at otherwise insulating multiferroic spinel MFe2O4 (M=Co, Ni, Mn and Fe) ferrites / epitaxial BaTiO3 (001) (BTO) interfaces. We wish also to determine the location of the breakdown once the lead experiences over currents and in particular the role of defects like edges between regions of different compositions.

本研究旨在探究原本绝缘的多铁尖晶石型MFe₂O₄（M=Co、Ni、Mn和Fe）铁氧体与外延钛酸钡(001)（BTO）界面处，由极化近场探针诱导生成的局域导电通道内的导电与击穿机制。此外，我们还拟确定当引线出现过电流时击穿发生的具体位置，尤其关注不同组分区域间的边缘类缺陷所发挥的作用。