Local confinement of switching filaments in transition metal oxides in electrical, chemical, mechanical, and thermal gradients (A04)

在这个项目中，我们将重点研究沿着模型氧化物TiO2和SrTiO3单晶中可切换纳米细丝的可逆I/M和M/M转变的性质。对纳米细丝的电学性质、电子结构和晶体结构以及化学组成进行实验研究，目的是验证由电和化学梯度诱导的相变过程。这些研究将通过从头计算来支持，以分析转变的不同步骤，并将I/M转变的“局部”和“化学”模型扩展到广泛的二元和三元过渡金属氧化物。

In this project we will focus our activities on investigating the nature of the reversible I/M and M/M transition along switchable nano-filaments in single crystals of the model oxides TiO2 and SrTiO3. The experimental studies of the electrical properties, electronic and crystallographic structure as well as chemical composition of the nano-filaments have the goal to verify phase transformation processes induced via electrical and chemical gradients. These investigations will be supported by ab initio calculations in order to analyse the different steps of the transformation and to extend the ¿local¿ and ¿chemical¿ model of the I/M transition to a broad class of binary and ternary transition metal oxides.