A&S Graduate Studies
[PAST EVENT] Physics Colloquium - Javad Shabani
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Javad Shabani, Associate Professor of Physics Director, Center for Quantum Information Physics (CQIP) New York University, Title of talk: Progress in Realizing Topological Superconductivity in Planar Josephson Junctions
Abstract: A central goal in condensed matter physics is to understand and control the order parameter characterizing the collective state of electrons in quantum heterostructures. For example, new physical behaviors can emerge that are absent in the isolated constituent materials. With regards to superconductivity this has opened a whole new area of investigation in the form of topological superconductivity. This type of superconductivity is expected to host exotic quasi-particle excitations including Majorana bound states. In this talk, we first discuss the important role of epitaxial superconductor-semiconductor hybrid systems as an enabling materials platform. We discuss the role of disorder and spin orbit coupling and how they may impact observation of topological phases in Josephson junctions. We present microwave measurements that exhibit unprecedented values of transparency for individual Andreev bound states and their extension in presence of magnetic field. These findings reveal a versatile two-dimensional platform to explore mesoscopic and topological superconductivity.
Sponsored by: Physics