Mertig was made a Fellow at the
Max Planck Institute of Microstructure Physics in 2007. Her research group study solid state theory. Specifically, she develops material specific descriptions of nanostructured systems. Mertig develops these descriptions using green functions, which can be used to describe thin films, surfaces or heterostructures. The computational effort required to perform these calculations scales with the numbers of atoms, making it possible to evaluate systems of a realistic size. She starts from the atomic structure of a system. Mertig is an expert in spintronics, which make use of an electron's charge and spin degree of freedom, could transform future sensors and information technologies. Mertig performs first-principles electronic structure calculations using
density functional theory. She has used simulations to understand spin-dependent transport processes in magnetic, metallic and molecular devices. Her calculations can explain spintronic phenomena, including
giant magnetoresistance, the
spin Nernst Effect and the
spin Hall effect. Mertig advised the
German Science and Humanities Council as an expert in 2017–2018. In 2024, she was awarded the
Institute of Physics Max Born Medal and Prize. == Selected publications ==