Masters Defense: Thomas Nordqvist

Electron microscopy methods for characterizing semi- superconductor hybrid nanowires
Semi - superconducting core-shell nanowires have attracted great attention as a promising material for hard gap induced superconductivity measurements. This is due to their ability to have epitaxial interfaces with atomic precision. Here I present epitaxial grown superconducting aluminum on semiconducting InAsSb nanowires, grown by Molecular Beam Epitaxy, with varied concentration of Antimony. I investigate the growth of InAsSb and the interfacial match alongside aluminum orientation with respect to the nanowire by different means of Electron Microscopy and thereby determine the driving forces that play the major role in the minimization of the grain excess energy.