David C. Bell1, Felix VonCube2
1Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, United States
2Hitachi High-Technologies Europe GmbH, Krefeld, Germany
Depending on the composition, Quantum Materials may act as conductors, insulators, semiconductors or even as superconductors. Especially combinations of different quantum materials are of high interest to explore new phenomena and to build the foundation for future electronic devices at the nanometer scale. The properties of quantum materials differ strongly from the properties of their three dimensional bulk state. Our research on quantum materials is widely spread, reaching from defect formation in graphene to the characterization of hybrid quantum materials. We use low voltage aberration corrected electron microscopy to investigate chemical various quantum materials. In particular, we will present imaging and analysis of vapor deposition (CVD) graphene with added copper and mercury defects; graphene based hybrid structures, and FeSn Topological Insulators. We will also present our attempts of investigation of Vacancy centers in diamond. Further, correlation of the electron microscopy results with such techniques as EELS, Raman spectroscopy and Atom Probe, provides an excellent tool for understanding and correlating atomic structure and structural defects to the astonishing mechanical and electric properties of quantum materials. Advantages of utilizing low voltage aberration corrected electron microscopy for this type of materials will be presented as well.
