Spin-polarized scanning tunneling spectroscopy on correlated electron systems

扫描隧道显微镜和光谱学(STM/STS)是研究具有原子分辨率的关联电子系统奇异电子基态不可缺少的工具。此外，自旋极化扫描隧道显微镜(SP-STM)可以获得自旋自由度。这种方法提供了对相关电子系统的电子和磁性的独特见解。在这个项目中，我将使用(SP-)STM/STS来研究原型关联电子系统中的自旋和电荷有序现象。该项目的重点将是过渡金属氧化物(TMO)和铁磷酸盐超导体。SP-STM方法将应用于铜酸盐高温超导体、高温超导材料和铁基铁基超导体等典型化合物的研究。作为最终目标，我们将研究非常规高温超导体Bi2Sr2CaCu2O8+d的电荷和自旋有序化。

Scanning tunneling microscopy and spectroscopy (STM/STS) is an indispensable tool to study exotic electronic ground states of correlated electron systems with atomic resolution. Furthermore the spin-degree of freedom can be accessed in spin-polarized scanning tunneling microscopy (SP-STM). This method provides unique insight into the electronic and magnetic properties of correlated electron systems. In this project I will use (SP-) STM/STS for the investigation of spin and charge ordering phenomena in prototypical correlated electron systems. The focus of the project will be on transition metal oxides (TMO) and iron pnictide superconductors. The method of SP-STM will be applied to prototypical compounds such as cuprate high-temperature superconductors HTSC and the iron pnictide Fe-based superconductors. As the ultimate goal the charge and spin ordering of the unconventional high-temperature superconductor Bi2Sr2CaCu2O8+d will be investigated.